1
|
Sakurada H, Nakamoto R, Takao Y, Moribata Y, Okuyama C. 18F-FDG PET/CT Findings of Surgically Transposed Ovaries After Radical Hysterectomy in a Young Adult Patient. Clin Nucl Med 2024:00003072-990000000-01040. [PMID: 38557760 DOI: 10.1097/rlu.0000000000005192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
ABSTRACT A 35-year-old woman underwent 18F-FDG PET/CT 2 months after a radical hysterectomy for uterine cervical cancer. An apparent FDG uptake was observed in an oval-shaped mass with an attached surgical clip in the right paracolic gutter. A similar non-FDG-avid mass with a clip was observed in the left. In this case, ovarian transposition had also been performed with metallic clips placed on both sides of the paracolic gutters. The increased FDG uptake in the right paracolic gutter was interpreted as physiological uptake in the right transposed ovary, not metastasis. Recognizing the possibility of FDG uptake in transposed ovaries is important.
Collapse
Affiliation(s)
- Hiroki Sakurada
- From the Department of Radiology, Japanese Red Cross Otsu Hospital, Otsu, Shiga, Japan
| | - Ryusuke Nakamoto
- Preemptive Medicine and Lifestyle Related Disease Research Center, Kyoto University Hospital, Kyoto, Kyoto, Japan
| | - Yumi Takao
- Department of Obstetrics and Gynecology, Shiga General Hospital, Moriyama, Shiga, Japan
| | - Yusaku Moribata
- Department of Radiology, Shiga General Hospital, Moriyama, Shiga, Japan
| | - Chio Okuyama
- Clinical Research Center, Shiga General Hospital, Moriyama, Shiga, Japan
| |
Collapse
|
2
|
Miyamoto M, Okuyama C, Kagawa S, Kusano K, Takahashi M, Takahata K, Jang MK, Yamauchi H. Correction: Radiation dosimetry and pharmacokinetics of the tau PET tracer florzolotau (18F) in healthy Japanese subjects. Ann Nucl Med 2024; 38:328. [PMID: 38451403 PMCID: PMC10955007 DOI: 10.1007/s12149-024-01917-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Affiliation(s)
| | - Chio Okuyama
- Shiga Medical Center Research Institute, Moriyama, Japan
| | - Shinya Kagawa
- Shiga Medical Center Research Institute, Moriyama, Japan
| | | | | | - Keisuke Takahata
- Institute for Quantum Medical Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, Chiba, Japan
| | | | - Hiroshi Yamauchi
- Shiga Medical Center Research Institute, Moriyama, Japan
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| |
Collapse
|
3
|
Okuyama C, Kusano K, Ito M, Takase A, Goda S, Kagawa S. Characteristic Muscular FDG Uptake Patterns Related to the Transportation Means Used by Patients to Visit the Hospital. Clin Nucl Med 2023; 48:549-552. [PMID: 36928161 DOI: 10.1097/rlu.0000000000004622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
ABSTRACT It is well-known that physiological FDG uptake in the skeletal muscles is affected by serum insulin levels and the extent to which the muscles contract before the examination. Patients are instructed to refrain from strenuous exercise, talking too much, and taking meals at least 4 hours before the administration of the tracer. Even if the patient does not intend to exercise, muscular accumulation related to specific behaviors can still be visualized in the images. In this manuscript, we present FDG PET/CT images from 4 cases reflecting the mode of transportation used by the patients to visit the hospital.
Collapse
Affiliation(s)
- Chio Okuyama
- From the Division of PET Imaging, Shiga Medical Center Research Institute, Moriyama, Japan
| | | | | | | | | | | |
Collapse
|
4
|
Miyamoto M, Okuyama C, Kagawa S, Kusano K, Takahashi M, Takahata K, Jang MK, Yamauchi H. Radiation dosimetry and pharmacokinetics of the tau PET tracer florzolotau (18F) in healthy Japanese subjects. Ann Nucl Med 2023; 37:300-309. [PMID: 36890399 PMCID: PMC10129982 DOI: 10.1007/s12149-023-01828-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 02/14/2023] [Indexed: 03/10/2023]
Abstract
OBJECTIVE Abnormal aggregation of tau in the brain is a major contributing factor in various neurodegenerative diseases. Florzolotau (18F) (florzolotau, APN-1607, PM-PBB3) has been shown to be a probe for tau fibrils in an animal model and patients with Alzheimer's disease and those with non-Alzheimer's disease tauopathies. The objective of this study is to evaluate the safety, pharmacokinetics, and radiation dose following a single intravenous administration of florzolotau in healthy Japanese subjects. METHODS Three healthy male Japanese subjects aged between 20 and 64 were enrolled in this study. Subjects were determined to be eligible based on the screening assessments at the study site. Subjects received a single intravenous dose of 195.0 ± 0.5 MBq of florzolotau and underwent the whole-body PET scan 10 times in total to calculate absorbed doses to major organs/tissues and effective dose. Radioactivities in whole blood and urine were also measured for pharmacokinetic evaluation. Absorbed doses to major organs/tissues and effective dose were estimated using the medical internal radiation dose (MIRD) method. Vital signs, electrocardiography (ECG), and blood tests were done for safety evaluation. RESULTS The intravenous injection of florzolotau was well tolerated. There were no adverse events or clinically detectable pharmacologic effects related to the tracer in any subjects. No significant changes in vital signs and ECG were observed. The highest mean initial uptake at 15 min after injection was in the liver (29.0 ± 4.0%ID), intestine (4.69 ± 1.65%ID), and brain (2.13 ± 0.18%ID). The highest absorbed dose was 508 μGy/MBq of the gallbladder wall, followed by the liver of 79.4 μGy/MBq, the pancreas of 42.5 μGy/MBq, and the upper large intestine of 34.2 μGy/MBq. The effective dose was calculated as 19.7 μSv/MBq according to the tissue weighting factor reported by ICRP-103. CONCLUSION Florzolotau intravenous injection was well tolerated in healthy male Japanese subjects. The effective dose was determined as 3.61 mSv when 185 MBq florzolotau was given.
Collapse
Affiliation(s)
| | - Chio Okuyama
- Shiga Medical Center Research Institute, Moriyama, Japan
| | - Shinya Kagawa
- Shiga Medical Center Research Institute, Moriyama, Japan
| | | | | | - Keisuke Takahata
- Institute for Quantum Medical Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, Chiba, Japan
| | | | - Hiroshi Yamauchi
- Shiga Medical Center Research Institute, Moriyama, Japan
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| |
Collapse
|
5
|
Yamauchi H, Kagawa S, Kusano K, Ito M, Okuyama C. Misery Perfusion and Tau Deposition in Atherosclerotic Major Cerebral Artery Disease: A
18
F-Florzolotau Positron Emission Tomography Study. Stroke 2022; 53:e500-e503. [DOI: 10.1161/strokeaha.122.040493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Background:
Studies using animal models have shown that cerebral hypoperfusion causes hyperphosphorylation of tau protein, leading to neuronal damage. However, the relationship between hypoperfusion and tau deposition in humans is unclear. Hence, we aimed to determine whether cerebral hypoperfusion leading to decreased blood flow relative to metabolic demand [increased oxygen extraction fraction (OEF), misery perfusion] is associated with increased tau deposition in patients with atherosclerotic internal carotid artery or middle cerebral artery disease.
Methods:
We prospectively evaluated the distribution of tau aggregate deposition using positron emission tomography and
18
F-florzolotau (PMPBB3 [1-fluoro-3-((2-((1E,3E)-4-(6-(methylamino)pyridine-3-yl)buta-1,3-dien-1-yl)benzo[d]thiazol-6-yl)oxy)propan-2-ol)]) in 8 patients with atherosclerotic disease of the internal carotid artery or middle cerebral artery. The standardized uptake value ratio of
18
F-florzolotau at 100 to 110 minutes after injection was calculated using the cerebellar cortex as a reference region and was correlated with OEF obtained from
15
O-gas positron emission tomography in the middle cerebral artery distributions.
Results:
Significant decreases in cerebral blood flow and cerebral metabolic rate of oxygen and increases in OEF were found in the hemisphere ipsilateral to the arterial lesion.
18
F-florzolotau standardized uptake value ratio in this region was also greater than that in the contralateral hemisphere. In the ipsilateral hemisphere,
18
F-florzolotau standardized uptake value ratio positively correlated with OEF values.
Conclusions:
This pilot study with a small sample size suggests that increases in OEF–misery perfusion–may be associated with increased tau aggregates deposition in atherosclerotic internal carotid artery or middle cerebral artery disease.
Collapse
Affiliation(s)
- Hiroshi Yamauchi
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Japan (H.Y.)
| | - Shinya Kagawa
- Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (S.K., K.K., M.I., C.O.)
| | - Kuninori Kusano
- Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (S.K., K.K., M.I., C.O.)
| | - Miki Ito
- Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (S.K., K.K., M.I., C.O.)
| | - Chio Okuyama
- Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (S.K., K.K., M.I., C.O.)
| |
Collapse
|
6
|
Yamauchi H, Kagawa S, Kusano K, Ito M, Okuyama C. Neuronal Alterations in Secondary Thalamic Degeneration Due to Cerebral Infarction: A
11
C-Flumazenil Positron Emission Tomography Study. Stroke 2022; 53:3153-3163. [PMID: 35862203 PMCID: PMC9508960 DOI: 10.1161/strokeaha.122.038846] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Studies using animal experiments have shown secondary neuronal degeneration in the thalamus after cerebral infarction. Neuroimaging studies in humans have revealed changes in imaging parameters in the thalamus, remote to the infarction. However, few studies have directly demonstrated neuronal changes in the thalamus in vivo. The purpose of this study was to determine whether secondary thalamic neuronal damage may manifest as a decrease in central benzodiazepine receptors in patients with cerebral infarction and internal carotid artery or middle cerebral artery disease.
Collapse
Affiliation(s)
- Hiroshi Yamauchi
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan (H.Y.)
| | - Shinya Kagawa
- Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (S.K., K.K., M.I., C.O.)
| | - Kuninori Kusano
- Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (S.K., K.K., M.I., C.O.)
| | - Miki Ito
- Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (S.K., K.K., M.I., C.O.)
| | - Chio Okuyama
- Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (S.K., K.K., M.I., C.O.)
| |
Collapse
|
7
|
Yamauchi H, Kagawa S, Kusano K, Ito M, Okuyama C. Visit-to-Visit Blood PressureVariations and Hemodynamic Deterioration in Atherosclerotic Major Cerebral ArteryDisease. J Stroke Cerebrovasc Dis 2021; 31:106206. [PMID: 34781205 DOI: 10.1016/j.jstrokecerebrovasdis.2021.106206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 10/18/2021] [Accepted: 10/24/2021] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE Visit-to-visit variations in blood pressure (BP) in patients with atherosclerotic major cerebral artery disease could impair the function of cerebral collaterals, leading to hemodynamic deterioration at follow-up. However, few studies have investigated the relationship between visit-to-visit BP variability and changes in hemodynamic parameters at follow-up. MATERIALS AND METHODS We evaluated 35 medically treated patients with atherosclerotic internal carotid artery or middle cerebral artery disease with no ischemic episodes during follow-up (mean: 35 ± 20 months); these patients had a three-time visit for positron emission tomography examinations with 15O-gas. Differences in the mean hemispheric values of hemodynamic parameters in the cortical territory of the diseased artery between the first and third examinations (changes at follow-up) were correlated with the coefficient of variation (CoV) in three systolic BP (SBP) values at the three examinations (BP variability during follow-up). RESULTS CoV values were negatively correlated with changes in oxygen metabolism or cerebral blood flow/cerebral blood volume (CBF/CBV) ratio. In 17 patients with higher CoV values (> group median, 0.072), decreases in CBF, cerebral metabolic rate of oxygen, and CBF/CBV ratio were observed at follow-up; CBV decreased in 18 patients without elevated CoV. A higher CoV was associated with a lack of statin use. CONCLUSION In patients with atherosclerotic major cerebral artery disease, high visit-to-visit SBP variations during follow-up may be associated with deterioration in cerebral hemodynamics and metabolism.
Collapse
Affiliation(s)
- Hiroshi Yamauchi
- Division of PET Imaging, Shiga Medical Center Research Institute, 5-4-30 Moriyama, Moriyama 524-8524, Japan.
| | - Shinya Kagawa
- Division of PET Imaging, Shiga Medical Center Research Institute, 5-4-30 Moriyama, Moriyama 524-8524, Japan
| | - Kuninori Kusano
- Division of PET Imaging, Shiga Medical Center Research Institute, 5-4-30 Moriyama, Moriyama 524-8524, Japan
| | - Miki Ito
- Division of PET Imaging, Shiga Medical Center Research Institute, 5-4-30 Moriyama, Moriyama 524-8524, Japan
| | - Chio Okuyama
- Division of PET Imaging, Shiga Medical Center Research Institute, 5-4-30 Moriyama, Moriyama 524-8524, Japan
| |
Collapse
|
8
|
Okuyama C, Higashi T, Ishizu K, Takahashi M, Kusano K, Kagawa S, Saga T, Yamauchi H. Physiologically decreased F-18 fluorodeoxyglucose uptake in the lower vertebrae associated with daily drinking habit in Japanese men with alcohol flushing reaction. Alcohol 2021; 95:15-23. [PMID: 33711409 DOI: 10.1016/j.alcohol.2021.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 02/22/2021] [Accepted: 03/04/2021] [Indexed: 11/24/2022]
Abstract
Alcohol flushing reaction (AFR) is known as one of the risks for esophageal squamous cell cancer, and scientists have been elucidating this issue. However, little attention has been given to relevant imaging features. This study aims to investigate whether physiological 18F-fluorodeoxyglucose (FDG) uptake patterns in vertebrae are associated with drinking habits or AFR. Japanese male patients who underwent FDG positron emission computed tomography for evaluation of their known or suspected malignancies or inflammatory diseases were asked about their drinking habits and AFR. Altogether, 192 patients, 139 every-day drinkers and 53 non-drinkers were evaluated. Comparing the FDG uptake between that in the thoracic region and that in the lumbar region, vertebral uptake was visually classified into four patterns: Ld, dominant in lumbar region; TL, almost equal in both regions; BL, slightly higher in thoracic region (borderline pattern); Td, dominant in thoracic region. The uptake patterns were evaluated according to drinking habit (every-day drinker or non-drinker), AFR (flusher or non-flusher), and the combination of these two factors (habit/reaction: every-day drinker/flusher, every-day drinker/non-flusher, non-drinker/flusher, or non-drinker/non-flusher). There were 95 flushers (51 every-day drinkers and 44 non-drinkers) and 97 non-flushers (88 every-day drinkers and 9 non-drinkers). Ld, TL, BL, and Td patterns were observed in 0, 109 (56.8%), 31 (16.1%), and 52 (27.1%) patients, respectively. Td and BL patterns were more frequently observed in every-day drinkers compared with non-drinkers (p = 0.0467). Though the uptake patterns did not differ between flushers and non-flushers (p = 0.116), the Td pattern was more frequently observed in every-day drinkers/flushers (51%) compared with every-day drinkers/non-flushers (20.5%), non-drinkers/flushers (13.6%), and non-drinkers/non-flushers (22.2%) (p = 0.0014). The Td pattern was observed in patients with various diseases, with higher frequency in esophageal cancer, head and neck cancer, and lung cancer compared with other diseases. In conclusion, drinking habits and AFR were related to the vertebral uptake pattern with decreased uptake in the lumbar region in Japanese male patients.
Collapse
|
9
|
Komurasaki A, Okuyama C, Ushiro K, Fujino K, Ogita H, Matsumoto M, Miyabe S, Ito J. MO8-1 Examination of the usefulness of MeAIB PET for head and neck cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
10
|
Ubukata S, Oishi N, Higashi T, Kagawa S, Yamauchi H, Okuyama C, Watanabe H, Ono M, Saji H, Aso T, Murai T, Ueda K. Spatial Patterns of Amyloid Deposition in Patients with Chronic Focal or Diffuse Traumatic Brain Injury Using 18F-FPYBF-2 PET. Neuropsychiatr Dis Treat 2020; 16:2719-2732. [PMID: 33209027 PMCID: PMC7669502 DOI: 10.2147/ndt.s268504] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 10/12/2020] [Indexed: 11/23/2022] Open
Abstract
AIM Amyloid-β (Aβ) accumulation, accelerated by traumatic brain injury (TBI), may play a crucial role in neurodegeneration in chronic-stage TBI. The injury type could influence Aβ dynamics because of TBI's complex, heterogeneous nature. We, therefore, investigated spatial patterns of amyloid deposition according to injury type after TBI using 5-(5-(2-(2-(2-[F]-fluoroethoxy)ethoxy)ethoxy)benzofuran-2-yl)-N-methylpyridin-2-amine (18F-FPYBF-2) positron emission tomography (PET). METHODS Altogether, 20 patients with chronic TBI [12 with focal injury, 8 with diffuse axonal injury (DAI)] underwent 18F-FPYBF-2 PET, structural magnetic resonance imaging (MRI), and neuropsychological examination. Additionally, 50 healthy controls underwent either 18F-FPYBF-2 PET (n=30) or structural MRI (n=20). RESULTS Standardized uptake value ratio (SUVR) on PET images and regional brain volumes were measured in four cortical (frontal, parietal, occipital, temporal) and subcortical (combined caudate, putamen, pallidum, thalamus) regions. Patients with DAI showed significantly increased (compared with controls) SUVR in occipital and temporal cortices and decreased brain volume in occipital cortex (corrected p < 0.05). Although patients with focal injury showed decreased SUVR in all regions except occipital cortex, there were no significant differences (compared with controls) in the SUVR in any regions. There were no significant correlations between increased SUVR and neuropsychological impairments in patients with DAI. CONCLUSION Varying spatial patterns of amyloid deposition suggest amyloid pathology diversity depending on the injury type in chronic-TBI patients.
Collapse
Affiliation(s)
- Shiho Ubukata
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Naoya Oishi
- Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Tatsuya Higashi
- Shiga Medical Center Research Institute, Moriyama, Japan.,Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), Chiba, Japan
| | - Shinya Kagawa
- Shiga Medical Center Research Institute, Moriyama, Japan
| | | | - Chio Okuyama
- Shiga Medical Center Research Institute, Moriyama, Japan
| | - Hiroyuki Watanabe
- Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Masahiro Ono
- Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Hideo Saji
- Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Toshihiko Aso
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Toshiya Murai
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Keita Ueda
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| |
Collapse
|
11
|
Okuyama C, Higashi T, Nakamoto R, Ishizu K, Takahashi M, Kusano K, Kagawa S, Saga T, Yamauchi H. Predominance and homogeneity patterns of physiological FDG accumulation in thoracic and lumbar vertebrae: suspected mechanism of “bone pseudometastasis” on FDG-PET in Japanese patients with esophageal cancer. Ann Nucl Med 2019; 34:182-191. [DOI: 10.1007/s12149-019-01430-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 12/02/2019] [Indexed: 02/07/2023]
|
12
|
Ohno K, Uchiyama M, Tsukamoto E, Okuyama C, Kawamoto M, Yoshimura M, Miyake KK. [Report in 2017 April ~ 2018 March]. Kaku Igaku 2019; 56:157-159. [PMID: 31685756 DOI: 10.18893/kakuigaku.wgr.1988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Women physicians, scientists and nurses are addressing many problems encountered in the practice of their chosen fields. We carried out a survey of the women working in the nuclear medicine field. Two hundred and six professionals answered this questionnaire. The findings of our survey were that we have many female bosses (experts), a low number of sexual harassment issues and enough parental leave. Many members work very hard to practice in this field, but they do not have enough support from their hospitals or research centers, to join medical conferences. And almost a quarter of those surveyed thought it is hard to improve their careers after taking parental leave. A change of perception in how their male colleagues and counterparts regard women in the field of nuclear medicine is required. This change, along with women having a clear and realistic career plan are fundamental answers to the issues faced by women in nuclear medicine.
Collapse
|
13
|
Yamauchi H, Kagawa S, Takahashi M, Kusano K, Okuyama C. Selective neuronal damage and blood pressure in atherosclerotic major cerebral artery disease. J Neurol Neurosurg Psychiatry 2019; 90:975-980. [PMID: 31127015 PMCID: PMC6820160 DOI: 10.1136/jnnp-2019-320326] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 04/02/2019] [Accepted: 04/05/2019] [Indexed: 11/04/2022]
Abstract
OBJECTIVE In patients with atherosclerotic major cerebral artery disease, low blood pressure might impair cerebral perfusion, thereby exacerbate the risk of selective neuronal damage. The purpose of this retrospective study was to determine whether low blood pressure at follow-up is associated with increased selective neuronal damage. METHODS We retrospectively analysed data from 76 medically treated patients with atherosclerotic internal carotid artery or middle cerebral artery disease with no ischaemic episodes on a follow-up of 6 months or more. All patients had measurements of the distribution of central benzodiazepine receptors twice using positron emission tomography and 11C-flumazenil. Using three-dimensional stereotactic surface projections, we quantified abnormal decreases in the benzodiazepine receptors of the cerebral cortex within the middle cerebral artery distribution and correlated these changes in the benzodiazepine receptors index with blood pressure values at follow-up examinations. RESULTS The changes in the benzodiazepine receptor index during follow-up (mean 27±21 months) were negatively correlated with systolic blood pressure at follow-up. The relationship between changes in benzodiazepine receptor index and systolic blood pressure was different among patients with and without decreased cerebral blood flow at baseline (interaction, p<0.005). Larger increases in benzodiazepine receptor index (neuronal damage) were observed at lower systolic blood pressure levels in patients with decreased cerebral blood flow than in patients without such decreases. CONCLUSION In patients without ischaemic stroke episodes at follow-up but with decreased cerebral blood flow due to arterial disease, low systolic blood pressure at follow-up may be associated with increased selective neuronal damage.
Collapse
Affiliation(s)
- Hiroshi Yamauchi
- Division of PET Imaging, Shiga Medical Center Research Institute, Moriyama, Japan
| | - Shinya Kagawa
- Division of PET Imaging, Shiga Medical Center Research Institute, Moriyama, Japan
| | - Masaaki Takahashi
- Division of PET Imaging, Shiga Medical Center Research Institute, Moriyama, Japan
| | - Kuninori Kusano
- Division of PET Imaging, Shiga Medical Center Research Institute, Moriyama, Japan
| | - Chio Okuyama
- Division of PET Imaging, Shiga Medical Center Research Institute, Moriyama, Japan
| |
Collapse
|
14
|
Okuyama C, Higashi T, Ishizu K, Nakamoto R, Takahashi M, Kusano K, Kagawa S, Yamauchi H. Bone Pseudometastasis on 18F-FDG PET in Japanese Patients With Esophageal Cancer. Clin Nucl Med 2019; 44:771-776. [DOI: 10.1097/rlu.0000000000002625] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
15
|
Okuyama C, Matsushima S, Nishimura M, Yamada K. Increased 18F-FDG accumulation in the tonsils after chemotherapy for pediatric lymphoma: a common physiological phenomenon. Ann Nucl Med 2019; 33:368-373. [PMID: 30689118 DOI: 10.1007/s12149-019-01337-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 01/10/2019] [Indexed: 01/21/2023]
Abstract
OBJECTIVE Increased 18F-fluorodeoxyglucose (FDG) uptake in the tonsils after the completion of chemotherapy in patients with lymphoma may be misdiagnosed as tumor recurrence. This study aimed to investigate the changes in physiological FDG uptake in the tonsils during and after chemotherapy in pediatric patients with lymphoma. METHODS A total of 47 FDG-PET/CT scans acquired from 13 pediatric patients with lymphoma (before chemotherapy [preC] = 9; during chemotherapy [durC] = 12; within 1 month after the end of chemotherapy [endC] = 11; and after achieving complete response [postC] = 15) were retrospectively included in this study. FDG uptake in the palatine tonsils was assessed using maximum standardized uptake value (SUVmax). The relative size of the palatine tonsils was calculated as the tonsil-pharyngeal ratio (TPR). Serial changes in the SUVmax and TPR were evaluated. RESULTS The mean SUVmax was 3.7 ± 1.7, 2.6 ± 0.7, 2.3 ± 0.8, and 6.2 ± 1.6, at the preC, durC, endC, and postC scans, respectively (p < 0.0001); TPR was 59.0 ± 11.2%, 58.3 ± 9.4%, 54.4 ± 7.9%, and 62.2 ± 12.0% in these groups, respectively, with no significant inter-group differences. TPR and SUVmax showed no correlation. CONCLUSIONS Increased physiological FDG uptake in the tonsils is commonly observed after the completion of chemotherapy, even in the absence of reactive hypertrophy.
Collapse
Affiliation(s)
- Chio Okuyama
- Division of PET Imaging, Shiga Medical Center Research Institute, 5-4-30, Moriyama, Moriyama, Shiga, 524-8524, Japan. .,Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465, Kajiicho, Kamigyo-ku, Kyoto, 602-8566, Japan.
| | - Shigenori Matsushima
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465, Kajiicho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Motoki Nishimura
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465, Kajiicho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Kei Yamada
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465, Kajiicho, Kamigyo-ku, Kyoto, 602-8566, Japan
| |
Collapse
|
16
|
Okuyama C, Kimura M, Oda M, Kodani N, Aibe N, Yamazaki H. A Case of Thyroid Papillary Carcinoma: Remarkable Decrease in Multiple Lung Metastases within 40 Years after a Single Administration of Radioiodine without Thyroidectomy and with Later Anaplastic Transformation. Case Rep Oncol 2017; 10:928-937. [PMID: 29279694 PMCID: PMC5731137 DOI: 10.1159/000481500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 09/14/2017] [Indexed: 12/31/2022] Open
Abstract
Differentiated thyroid carcinoma is an uncommon malignancy of childhood and adolescence that is unique because it has an overall favorable prognosis despite its relatively high rate of nodal and distant metastases. Total thyroidectomy and positive 131I therapy are recommended for cases with pulmonary metastases. In contrast, anaplastic thyroid cancer is one of the most aggressive malignancies that have an unfavorable and miserable prognosis. We report a case with an impressively long history. The patient had multiple pulmonary metastases that had been diagnosed by 131I administration when he was 14 years old, about 45 years before he underwent thyroidectomy. He had been kept unaware of his disease by his family and received no treatment for most of his life. Pulmonary nodules were noted at several medical checkups and showed a remarkable decrease in size during the untreated 44-year period after the 131I administration. At age 58, his thyroid cancer was first detected and total thyroidectomy was performed, with subsequent radioiodine therapy for pulmonary metastases. Unfortunately, anaplastic carcinoma developed and he died of disseminated tumors later.
Collapse
Affiliation(s)
- Chio Okuyama
- Shiga Medical Center, Research Institute, Moriyama, Japan.,Department of Radiology, Graduate School of Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Mitsuhiro Kimura
- Department of Otorhinolaryngology, Shimane Prefectural Central Hospital, Izumo, Japan
| | - Minori Oda
- Department of Radiology, Graduate School of Kyoto Prefectural University of Medicine, Kyoto, Japan.,Image Communication Corporation, Kyoto, Japan
| | - Naohiro Kodani
- Department of Radiology, Graduate School of Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department of Radiology, Kyoto Second Red Cross Hospital, Kyoto, Japan
| | - Norihiro Aibe
- Department of Radiology, Graduate School of Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hideya Yamazaki
- Department of Radiology, Graduate School of Kyoto Prefectural University of Medicine, Kyoto, Japan
| |
Collapse
|
17
|
Nakajima K, Matsuo S, Okuyama C, Hatta T, Tsukamoto K, Nishimura S, Yamashina A, Kusuoka H, Nishimura T. CORRIGENDUM: Cardiac Event Risk in Japanese Subjects Estimated Using Gated Myocardial Perfusion Imaging, in Conjunction With Diabetes Mellitus and Chronic Kidney Disease. Circ J 2015; 79:2283. [PMID: 26411403 DOI: 10.1253/circj.cj-66-0118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
18
|
Fujiwara Y, Mizuno T, Okuyama C, Nagakane Y, Watanabe-Hosomi A, Kondo M, Kuriyama N, Tokuda T, Matsushima S, Nishimura T, Nakagawa M. Simultaneous impairment of intracranial and peripheral artery vasoreactivity in CADASIL patients. Cerebrovasc Dis 2011; 33:128-34. [PMID: 22179564 DOI: 10.1159/000334185] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Accepted: 09/16/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Reduced cerebrovascular reactivity (CVR) is an important step in the pathogenesis of cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL). The present study utilized quantitative single photon emission computed tomography (SPECT) with the autoradiographic (ARG) method and reactive hyperemia peripheral arterial tonometry (RH-PAT) to assess vasoreactivity in intracranial arteries and in peripheral arteries in patients with CADASIL. METHODS Quantitative SPECT studies were conducted in eight patients with CADASIL, while RH-PAT analysis was conducted in eight CADASIL patients and in eight age-matched normal subjects. Quantitative SPECT studies with the ARG method were performed at baseline and after administration of acetazolamide. Regional cerebral blood flow (rCBF) values were measured using stereotactic extraction estimation (SEE) methods. The rCBF of CADASIL patients was averaged in the bilateral frontal, temporal, parietal, and occipital lobes as well as in the limbic system, cerebellar hemisphere, whole cerebral cortex and basal ganglia. The CVR index from acetazolamide stress of intracranial arteries was calculated in each area. Vasoreactivity of peripheral arteries was estimated by the reactive hyperemia index (RHI) measured with a PAT device before and after interruption of arterial flow. RESULTS Average RHI after post-deflation was lower in CADASIL patients than in normal subjects. RHI correlated significantly with CVR in all brain areas in CADASIL patients. CONCLUSIONS Vasoreactivity is reduced in peripheral arteries and in intracranial arteries in patients with CADASIL.
Collapse
Affiliation(s)
- Yasuhiro Fujiwara
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Nakajima K, Matsuo S, Okuyama C, Hatta T, Tsukamoto K, Nishimura S, Yamashina A, Kusuoka H, Nishimura T. Cardiac event risk in Japanese subjects estimated using gated myocardial perfusion imaging, in conjunction with diabetes mellitus and chronic kidney disease. Circ J 2011; 76:168-75. [PMID: 22104035 DOI: 10.1253/circj.cj-11-0857] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Cardiac event risk is estimated using quantitative gated myocardial perfusion imaging (MPI) and clinical background in patients with ischemic heart disease. The aim of the present study was to calculate major cardiac event risk and tabulate it in the Heart Risk Table for clinical use of risk stratification. METHODS AND RESULTS Multivariate logistic regression was performed based on a multicenter prognostic database (Japanese Assessment of Cardiac Events and Survival Study by Quantitative Gated Single-photon emission computed tomography [J-ACCESS investigation]) using MPI (n=2,395). The risk of major cardiac events (cardiac death, non-fatal myocardial infarction and heart failure requiring hospitalization) was estimated using age, ejection fraction (EF), estimated glomerular filtration rate (eGFR) and presence of diabetes mellitus (DM). Age-matched standard eGFR was determined in 77 subjects. Major cardiac event risk was calculated using the equation: risk (%/3 years)=1/(1+Exp(-(-4.699-0.0151×eGFR+0.7998×DM+0.0582×age+0.697×SSS-0.0359×EF))×100, where SSS refers to summed stress scores. Risk was determined without eGFR (the initial version) and using the present formula with eGFR (revised version), with consistent results. DM and chronic kidney disease were major determinants of cardiac events. CONCLUSIONS Cardiac event risk was estimated using MPI defect score and left ventricular EF in conjunction with eGFR and the presence of DM. The risk table might be used for risk evaluation in Japanese patients undergoing MPI.
Collapse
Affiliation(s)
- Kenichi Nakajima
- Department of Nuclear Medicine, Kanazawa University Hospital, Kanazawa, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Matsuoka T, Narumoto J, Shibata K, Okamura A, Nakamura K, Okuyama C, Nishimura T, Fukui K. Insular hypoperfusion correlates with the severity of delusions in individuals with Alzheimer's disease. Dement Geriatr Cogn Disord 2010; 29:287-93. [PMID: 20375510 DOI: 10.1159/000295115] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/22/2010] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The aim of this study was to identify the brain regions associated with the severity of delusions in individuals with Alzheimer's disease (AD) using single-photon emission computed tomography. METHODS Thirty-five AD patients participated in this study. Multiple regression analysis was performed to identify a linear correlation between the delusion subscale score of the Neuropsychiatric Inventory (NPI) and regional cerebral blood flow (rCBF) in AD patients with delusions (n = 14). In addition, rCBF in patients with (n = 14) and without delusions (n = 21) was compared using a 2-sample t test. RESULTS The delusion subscale score of the NPI was negatively correlated with rCBF in the right anterior insula (uncorrected p < 0.01 at the voxel level and corrected p < 0.05 at the cluster level). Compared to patients without delusions, however, rCBF in the right anterior insula was not significantly decreased in patients with delusions. CONCLUSION We suggest that right anterior insular dysfunction may exacerbate delusions, although it is not responsible for the onset of delusions.
Collapse
Affiliation(s)
- Teruyuki Matsuoka
- Department of Psychiatry, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan. tmms2004 @ koto.kpu-m.ac.jp
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Yamagami T, Kanda K, Okuyama C, Nishimura T. Tc-99m-MIBI scintigraphy in evaluating the effect of hepatocyte growth factor gene therapy for peripheral arteriosclerosis obliterans. Ann Nucl Med 2009; 23:205-8. [PMID: 19225945 DOI: 10.1007/s12149-008-0220-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Accepted: 11/11/2008] [Indexed: 11/29/2022]
Abstract
We report an 81-year-old man with arteriosclerosis obliterans with sharp rest pain of the left lower leg below the knee that was resistant to conventional drug therapy. Gene therapy using hepatocyte growth factor (HGF) was performed, following which the symptoms remarkably improved. Magnetic resonance (MR) angiography did not detect any development of collateral vessels following gene therapy; however, technetium-99m-methoxyisobutylisonitrile (Tc-99m)-MIBI scintigraphy revealed the development of micro-circulation in the lower leg following HGF gene therapy. This is the first report on the usefulness of Tc-99m-MIBI scintigraphy to evaluate the effectiveness of HGF gene therapy for peripheral arteriosclerosis obliterans.
Collapse
Affiliation(s)
- Takuji Yamagami
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | | | | | | |
Collapse
|
22
|
Minamimoto R, Senda M, Uno K, Jinnouchi S, Iinuma T, Ito K, Okuyama C, Oguchi K, Kawamoto M, Suzuki Y, Tsukamoto E, Terauchi T, Nakashima R, Nishio M, Nishizawa S, Fukuda H, Yoshida T, Inoue T. Performance profile of FDG-PET and PET/CT for cancer screening on the basis of a Japanese Nationwide Survey. Ann Nucl Med 2007; 21:481-98. [PMID: 18030580 DOI: 10.1007/s12149-007-0061-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2007] [Accepted: 07/04/2007] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The aim of this study is to survey the situation of (18)F-fluorodeoxyglucose-positron emission tomography (FDG-PET) cancer screening in Japan and to describe its performance profile. METHODS "FDG-PET for cancer screening" was defined as FDG-PET or positron emission tomography and computed tomography (PET/CT) scan with or without other tests performed for cancer screening of healthy subjects. We sent questionnaires regarding FDG-PET cancer screening to 99 facilities in which FDG-PET tests were performed during the fiscal year 2005. Replies were obtained from 68 of the 99 facilities, of which 46 facilities performed FDG-PET cancer screening. The total number of subjects who underwent FDG-PET cancer screening was 50 558. From 38 of 46 facilities, reliable results of thorough examinations were obtained for the subjects who were positive by FDG-PET and/or one or more of the combined screening tests was performed and were referred for further evaluation. The total number of subjects in these 38 facilities amounted to 43 996. RESULTS A total of 50,558 healthy subjects underwent FDG-PET (including PET/CT) scanning with or without other tests for cancer screening in 46 PET centers during the fiscal year of 2005 in Japan. Thorough examination was indicated for 9.8% of the cases as a result of positive findings suggesting possible cancer. On analyzing 43 996 cases from 38 PET centers from which detailed information was obtained, 500 cases of cancers (1.14%) were found, of which 0.90% were PET positive and 0.24% were PET negative, resulting in the relative sensitivity of PET being 79.0%. Cancers of the thyroid, colon/rectum, lung, and breast were most frequently found (107, 102, 79, and 35 cases, respectively) with high PET sensitivity (88%, 90%, 80%, and 92%). PET showed an overall positive predictive value of 29.0%. PET/CT had a better detection rate, sensitivity, and positive predictive value than dedicated PET (P < 0.01). CONCLUSIONS We were able to clarify the performance profile of "FDG-PET for cancer screening" on the basis of a Japanese nationwide survey. The number of facilities possessing PET is increasing steadily, highlighting the necessity of evaluating the usefulness of "FDG-PET cancer screening" as soon as possible by undertaking long-term investigations of large series of subjects.
Collapse
Affiliation(s)
- Ryogo Minamimoto
- Department of Radiology, Yokohama City University, Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Minamimoto R, Senda M, Uno K, Jinnouchi S, Iinuma T, Ito K, Okuyama C, Oguchi K, Kawamoto M, Suzuki Y, Tsukamoto E, Terauchi T, Nakashima R, Nishio M, Nishizawa S, Fukuda H, Yoshida T, Inoue T. [Performance profile of FDG-PET and PET/CT for cancer screening based on a Japanese nationwide survey]. Kaku Igaku 2007; 44:105-124. [PMID: 18240583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A total of 50,558 healthy subjects underwent an FDG-PET (including PET/CT) scan with or without combination of other tests for cancer screening in 46 PET centers during fiscal year of 2005 in Japan. Thorough examination was indicated for 9.8% of the cases due to positive findings suggesting possible cancer. On analyzing 43,996 cases from 38 PET centers, where detailed information was obtained, 500 cases of cancers (1.14%) were found, of which 0.90% was PET positive and 0.24% was PET negative, resulting in the relative sensitivity of PET being 79.0%. Cancers of thyroid, colon/rectum, lung and breast were most frequently found (107, 102, 79, 35 cases, respectively) with high PET sensitivity (88%, 90%, 80%, 92%). PET showed an overall positive predictive value of 29.0%. PET/CT had better detection rate, sensitivity, and positive predictive value than dedicated PET (p<0.01).
Collapse
Affiliation(s)
- Ryogo Minamimoto
- Department of Radiology, Graduate School of Medicine, Yokohama City University
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Ushuijima Y, Okuyama C, Mori S, Kubota T, Nakai T, Nishimura T. Regional cerebral blood flow in Alzheimer’s disease: Comparison between short and long-term donepezil therapy. Ann Nucl Med 2006; 20:425-9. [PMID: 16922471 DOI: 10.1007/bf03027378] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Treatment with donepezil improves cognitive function of patients with Alzheimer's disease (AD) when compared to a placebo-controlled group. The purpose of this study was to investigate changes in regional cerebral blood flow (rCBF) of AD patients in short-term and long-term treatment with donepezil. METHODS rCBF was measured by N-isopropyl-p-123I-iodoamphetamine (IMP) autoradiography method. CBF measurements were performed in 17 AD patients before treatment and after 3 months (short-term therapy) and 1 year (long-term therapy). Regions of interest were set at cerebral cortex and cerebellar hemisphere. We used absolute CBF and relative CBF expressed as ratio to cerebellar CBF. RESULTS Significant increases in relative rCBF were noted in the frontal, parietal and temporal lobes at the end of short-term therapy. rCBF was decreased after the long-term therapy, whereas rCBF was still increased to a slight extent, as compared with the pre-treatment levels. Absolute rCBF showed minimal change and a tendency to decline. CONCLUSION Relative rCBF significantly increased in the short-term donepezil therapy, while following the long-term therapy, rCBF decreased to the pre-treatment level.
Collapse
Affiliation(s)
- Yo Ushuijima
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan.
| | | | | | | | | | | |
Collapse
|
25
|
Goto M, Okuyama C, Kubota T, Ushijima Y, Nishimura T. Assessment of the solid-state gamma camera to depict axillary sentinel lymph nodes in breast cancer patients. Ann Nucl Med 2006; 19:627-31. [PMID: 16363630 DOI: 10.1007/bf02985058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
PURPOSE The solid-state gamma camera is now commercially available offering the advantages of a compact and portable system, currently used mainly in the cardiac region. We evaluate the ability of the solid-state gamma camera to depict axillary sentinel lymph nodes (SLNs) in breast cancer patients. MATERIALS AND METHODS Preoperative SLN lymphoscintigraphy (LSG) was performed in 19 patients with breast cancer using the solid-state gamma camera. Immediately thereafter, we performed a second LSG using a single detector Anger-type gamma camera, and compared the findings from the two cameras. RESULTS Concordant results were obtained in 12 (63%) patients with both cameras. In 4 (21%) patients, axillary SLNs were correctly identified only with the solid-state gamma camera. In these patients, the distance between the SLN and the radiopharmaceutical injection site was closer than that of patients who had concordant results (p = 0.001). CONCLUSION We can depict correctly axillary SLNs with the solid-state gamma camera in comparison with the Anger-type gamma camera. This technique would be useful for assessing SLNs in breast cancer patients.
Collapse
Affiliation(s)
- Mariko Goto
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajiicho, Kawaramachi Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | | | | | | | | |
Collapse
|
26
|
Kubota T, Ushijima Y, Okuyama C, Nishimura T. A region-of-interest template for three-dimensional stereotactic surface projection images: Initial application to the analysis of Alzheimer??s disease and mild cognitive impairment. Nucl Med Commun 2006; 27:37-44. [PMID: 16340722 DOI: 10.1097/01.mnm.0000188220.99580.88] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To construct a region-of-interest (ROI) template for Z-score images of three-dimensional stereotactic surface projections (3-D SSP) and to assess whether the ROI template can be a useful tool for evaluation of brain perfusion abnormalities of neurological disorders. MATERIALS AND METHODS We constructed the ROI template for Z-score images of 3-D SSP based on the standardized magnetic resonance imaging data of 10 healthy volunteers. We assigned a total of 26 ROIs to Z-score images and superimposed it on Z-score images constructed from the brain perfusion SPECT data of 15 patients with Alzheimer's disease and 10 patients with mild cognitive impairment (MCI) who developed Alzheimer's disease within the following 2 years. We then obtained the mean Z-scores of each ROI and examined them to determine whether the hypoperfusion typical of Alzheimer's disease had been demonstrated quantitatively. We also visually inspected the Z-score image of each patient in both groups to determine whether the areas with the highest Z-scores were demonstrated within the ROIs of regions typical of Alzheimer's disease. RESULTS In the patients with Alzheimer's disease, our ROI template quantitatively demonstrated hypoperfusion in regions typical of the disease and the Z-scores were very high. In the MCI patients, the mean Z-scores of the ROI in the posterior cingulated gyrus were the highest among all regions. Visual inspection of the Z-score images of each patient in both groups confirmed that the areas with the highest Z-scores were demonstrated within the ROIs in regions typical of Alzheimer's disease in all cases. CONCLUSION Use of 3-D SSP methods and our ROI template enables automated quantitative evaluation of brain function images over the entire brain surface. In addition, the ROI template may facilitate visual interpretation of functional images of individual patients with neurological disorders.
Collapse
Affiliation(s)
- Takao Kubota
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan.
| | | | | | | |
Collapse
|
27
|
Kobayashi K, Okuyama C, Kubota T, Nakai T, Ushijima Y, Nishimura T. Do short-time SPECT images of bone scintigraphy improve the diagnostic value in the evaluation of solitary lesions in the thoracic spine in patients with extraskeletal malignancies? Ann Nucl Med 2005; 19:557-66. [PMID: 16363620 DOI: 10.1007/bf02985048] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Single photon emission computed tomography (SPECT) images provide many details of the anatomical structure. Also about bone scintigraphy, there are many reports of the improvement of diagnosis by SPECT images. Although SPECT is useful, it requires much time. So to perform SPECT for all cases is difficult in the clinical situation. Recently, due to technical improvements in gamma cameras, we can get SPECT images in a short time. We examined diagnosis of solitary hot spots of thoracic spine in cancer patients using short-time SPECT. And we considered whether short-time SPECT contributes to the precise diagnosis of the lesion. MATERIAL AND METHODS We performed bone scintigraphy image acquisition and both planar and short-time SPECT of the chest. Short-time SPECT was acquired in 6 minutes. We selected 36 cases with malignancy, whose bone scintigraphy demonstrated a solitary accumulation hot spot in the thoracic spine. Three experienced radiologists in nuclear medicine and 4 beginners diagnosed the images. They interpreted planar, short-time SPECT and maximum intensity projection (MIP) view of the chest of each case. The observers' response data were analyzed with receiver operating characteristic (ROC) curve analysis. RESULTS Of the three types of images, the Az (the area under ROC curve) values of short-time SPECT were the highest in all the observers except for only one beginner. Compared with experienced observers, beginners scored lower Az values of short-time SPECT. MIP images were constructed using SPECT data, but the Az values of MIP images were not higher than those of planar images. As to diagnosis, beginners tended to interprete most of the accumulations as metastatic lesions. CONCLUSION Short-time SPECT can be helpful to some degree, but to provide greater benefit, the observers require considerable exercise and experience.
Collapse
Affiliation(s)
- Kana Kobayashi
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajiicho, Kawaramachi Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan
| | | | | | | | | | | |
Collapse
|
28
|
Nakai T, Okuyama C, Kubota T, Yamada K, Ushijima Y, Taniike K, Suzuki T, Nishimura T. Pitfalls of FDG-PET for the diagnosis of osteoblastic bone metastases in patients with breast cancer. Eur J Nucl Med Mol Imaging 2005; 32:1253-8. [PMID: 16133397 DOI: 10.1007/s00259-005-1842-8] [Citation(s) in RCA: 154] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2005] [Accepted: 04/29/2005] [Indexed: 10/25/2022]
Abstract
PURPOSE The purpose of this study was to investigate the pitfalls of using 2-[18F]-fluoro-2-deoxy-D: -glucose positron emission tomography (FDG-PET) for the evaluation of osteoblastic bone metastases in patients with breast cancer by comparing it with (99m)Tc-hydroxymethylene diphosphonate bone scintigraphy. METHODS Among the 89 breast cancer patients (mean age 59+/-15 years) who had undergone both FDG-PET and bone scintigraphy within 1 month between September 2003 and December 2004, 55 with bone metastases were studied. The bone metastases were visually classified by multi-slice CT into four types according to their degree of osteosclerosis and osteolysis-osteoblastic, osteolytic, mixed and invisible-and compared in terms of tracer uptake on FDG-PET or bone scintigraphy and SUV(mean) on FDG-PET. Differences in the rate of detection on bone scintigraphy and FDG-PET were analysed for significance by the McNemar test. RESULTS The sensitivity, specificity and accuracy of bone scintigraphy were 78.2%, 82.4% and 79.8% respectively, and those of FDG-PET were 80.0%, 88.2% and 83.1%, respectively, revealing no significant differences. According to the CT image type, the visualisation rate of bone scintigraphy/FDG-PET was 100%/55.6% for the blastic type, 70.0%/100.0% for the lytic type, 84.2%/94.7% for the mixed type and 25.0%/87.5% for the invisible type. The visualisation rates of bone scintigraphy for the blastic type and FDG-PET for the invisible type were significantly higher. The SUV(mean) of the blastic, lytic, mixed and invisible types were 1.72+/-0.28, 4.14+/-2.20, 2.97+/-1.98 and 2.25+/-0.80, respectively, showing that the SUV(mean) tended to be higher for the lytic type than for the blastic type. CONCLUSION FDG-PET showed a low visualisation rate in respect of osteoblastic bone metastases. Although FDG-PET is useful for detection of bone metastases from breast cancer, it is apparent that it suffers from some limitations in depicting metastases of the osteoblastic type.
Collapse
Affiliation(s)
- Takako Nakai
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Abstract
F-18 2-fluoro-2-deoxy-D-glucose (FDG) positron emission tomography (PET) is useful for surveys to detect bone metastasis because of its greater specificity than bone scintigraphy. However, FDG-PET is also known to yield false-positive results in acute fractures and inflammatory lesions, and distinguishing between benign and malignant lesions is difficult, even when semiquantitative methods are used. We report a case of multiple bone metastases of gastric cancer. One of the bone lesions that was positive for FDG uptake was benign, suggesting that FDG-PET can yield false-positive results.
Collapse
Affiliation(s)
- Takako Nakai
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine.
| | | | | | | | | |
Collapse
|
30
|
Nakai T, Okuyama C, Kubota T, Kobayashi K, Tsubokura T, Ushijima Y, Nishimura T. Pattern of111in-chloride bone marrow scintigraphy in myelodysplastic syndrome; comparison with clinical characteristics. Ann Nucl Med 2004; 18:675-80. [PMID: 15682848 DOI: 10.1007/bf02985961] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
111In-chloride bone marrow scintigraphy (bone marrow scintigraphy) was performed in patients with myelodysplastic syndrome (MDS), tracer accumulation was classified into patterns, and the relationship between the accumulation patterns and prognostic factors was investigated to assess the usefulness of bone marrow scintigraphy. The subjects were 14 patients diagnosed with MDS. Accumulation of the bone marrow scintigraphy tracer was classified according to the degree of accumulation in the axial bone marrow and peripheral expansion. International Prognostic Scoring System (IPSS), which are frequently used for prognostic evaluation of MDS, and conversion to leukemia were investigated in prognostic factors. We also investigated the relationship between enlargement of the liver and spleen and the prognostic factors. The accumulation patterns were as follows: pattern I, The normal accumulation pattern (2 cases); pattern II, the expanded accumulation pattern (6 cases); pattern III, low accumulation pattern (5 cases); and pattern IV, heterogeneous accumulation pattern (1 case). The relationships between the two prognostic factors and accumulation patterns were investigated, and the prognosis was found to be significantly poorer in the patients with the low accumulation pattern than the expanded accumulation pattern. Enlargement of the liver and spleen was not significantly correlated with the prognostic factors.
Collapse
Affiliation(s)
- Takako Nakai
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan.
| | | | | | | | | | | | | |
Collapse
|
31
|
Kubota T, Ushijima Y, Yamada K, Okuyama C, Kizu O, Nishimura T. Diagnosis of Alzheimer?s disease using brain perfusion SPECT and MR imaging: which modality achieves better diagnostic accuracy? Eur J Nucl Med Mol Imaging 2004; 32:414-21. [PMID: 15821961 DOI: 10.1007/s00259-004-1704-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2004] [Accepted: 09/12/2004] [Indexed: 12/20/2022]
Abstract
PURPOSE The purpose of this study was to compare the accuracy of MR imaging and brain perfusion single-photon emission tomography (SPECT) in diagnosing Alzheimer's disease (AD). METHODS The transaxial section display of brain perfusion SPECT, three-dimensional stereotactic surface projection (3D-SSP) SPECT image sets, thin-section MR imaging of the hippocampus and perfusion MR imaging were evaluated in 66 subjects comprising 35 AD patients and 31 subjects without AD. SPECT and MR imaging were visually interpreted by two experts and two novices, and the diagnostic ability of each modality was evaluated by receiver operating characteristic (ROC) analysis. RESULTS In the experts' interpretations, there was no significant difference in the area under the ROC curve (Az) between 3D-SSP and thin-section MR imaging, whereas the Az of transaxial SPECT display was significantly lower than that of 3D-SSP (3D-SSP: 0.97, thin-section MR imaging: 0.96, transaxial SPECT: 0.91), and the Az of perfusion MR imaging was lowest (0.63). The sensitivity and specificity of each modality were, respectively, 80.0% and 96.8% for 3D-SSP, 77.1% and 96.8% for thin-section MR imaging, 60.0% and 93.5% for transaxial SPECT display and 34.3% and 100% for perfusion MR imaging. In the novices' interpretations, the Az, sensitivity and specificity of 3D-SSP were superior to those of thin-section MR imaging. CONCLUSION Thin-section hippocampal MR imaging and 3D-SSP image sets had potentially equivalent value for the diagnosis of AD, and they were superior to transaxial SPECT display and perfusion MR imaging. For avoidance of the effect of interpreters' experience on image evaluation, 3D-SSP appears to be optimal.
Collapse
Affiliation(s)
- Takao Kubota
- Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Radiology, Kyoto, Japan.
| | | | | | | | | | | |
Collapse
|
32
|
Hirota T, Yamagami T, Nakamura T, Okuyama C, Ushijima Y, Nishimura T. Small pulmonary arteriovenous fistulae revealed by scintigraphy during selective injection of 99Tc(m)-macroaggregated albumin. Br J Radiol 2004; 77:445-8. [PMID: 15121712 DOI: 10.1259/bjr/80737867] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
We report a case of small pulmonary arteriovenous fistulae precisely diagnosed by a combination of selective pulmonary arteriography and scintigraphy during (99)Tc(m)-macroaggregated albumin injection via the peripheral pulmonary artery.
Collapse
Affiliation(s)
- T Hirota
- Department of Radiology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo, Kyoto, 602-8566, Japan
| | | | | | | | | | | |
Collapse
|
33
|
Nakai T, Okuyama C, Kubota T, Kobayashi K, Ushijima Y, Nishimura T. Detection of parathyroid hyperplasia, lymph node metastasis from thyroid cancer, and thyroid adenomatous hyperplasia using Tc-99m MIBI. Clin Nucl Med 2003; 28:984-5. [PMID: 14663323 DOI: 10.1097/01.rlu.0000099810.97239.f3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Takako Nakai
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kaiji-cho, Kawaramachi Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | | | | | | | | | | |
Collapse
|
34
|
Okuyama C, Ushijima Y, Kubota T, Yoshida T, Nakai T, Kobayashi K, Nishimura T. 123I-Metaiodobenzylguanidine uptake in the nape of the neck of children: likely visualization of brown adipose tissue. J Nucl Med 2003; 44:1421-5. [PMID: 12960186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
Abstract
UNLABELLED The distribution of radioiodinated metaiodobenzylguanidine (MIBG) has been studied primarily in patients with neuroendocrine tumors-in pediatrics, particularly with neuroblastomas. Sometimes, symmetric accumulation in which no tumor is identified is seen in the nape-of-the-neck region. We estimated visually whether accumulation was found in the nape of the neck and studied the characteristics of the accumulation. METHODS Retrospectively, we investigated 266 (123)I-MIBG scintigraphic studies performed on pediatric patients who had been treated for neuroendocrine tumors or who were suspected of having such tumors. RESULTS Accumulation in the nape of the neck was seen in 32 of 266 studies (12%); in none of these cases was the accumulation identified as a tumor by other imaging modalities or follow-up studies. In the same individuals, the accumulation varied and it was observed more often during winter. CONCLUSION Symmetric (123)I-MIBG accumulations in the nape-of-the-neck region observed in children are thought to be related to the uptake in brown adipose tissue.
Collapse
Affiliation(s)
- Chio Okuyama
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
| | | | | | | | | | | | | |
Collapse
|
35
|
Okuyama C, Ushijima Y, Suzuki K, Kin Y, Tokuhiro M, Nakano Y, Nishimura T. Transient aphasia as late-onset seizure after embolization for dural arteriovenous malformation. Clin Nucl Med 2003; 28:685-6. [PMID: 12897662 DOI: 10.1097/01.rlu.0000079433.88218.1a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Tc-99m HMPAO single photon emission computed tomography was performed in a patient who had experienced aphasia for 3 days. The patient had a medical history of subarachnoid hemorrhage and intracranial hemorrhage. Both of these hemorrhages were related to a dural arteriovenous malformation that was embolized after the onset of the cerebral vascular events. Focal hyperperfusion was seen in the left temporal lobe adjacent to a perfusion defect corresponding to the old cerebral hemorrhage. The finding was interpreted as the focus of the patient's epilepsy. His aphasia resolved after the administration of anticonvulsant medication for several days.
Collapse
Affiliation(s)
- Chio Okuyama
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
| | | | | | | | | | | | | |
Collapse
|
36
|
Yuen S, Sawai K, Ushijima Y, Okuyama C, Yamagami T, Yamada K, Nishimura T. Evaluation of axillary status in breast cancer. CT-based determination of sentinel lymph node size. Acta Radiol 2002. [PMID: 12485255 DOI: 10.1034/j.1600-0455.2002.430608.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE To determine whether the location and size of sentinel lymph nodes (SLN) on CT are predictive of the axillary lymph node status in patients with breast cancer. MATERIAL AND METHODS Forty patients with confirmed breast cancer underwent 5-mm CT of both breasts and axillae and the most inferior lymph node in the affected axilla was designated the SLN. Based on CT assessment of the axillary lymph node status, 22 (55%) patients then underwent dye- and gamma probe (DGP)-guided SLN biopsy followed by axillary dissection; 18 (45%) underwent dissection without prior SLN biopsy. The localization and status of the SLN determined on CT and by DGP-guided biopsy were compared. Biopsied and excised nodes were subjected to histopathologic examinations. RESULTS All SLN identified on CT were close to the lateral thoracic artery and their localization corresponded well with SLN identified by the DGP-guided method. The positive predictive value of CT diagnosis was 100%. Histopathologic examination of excised nodes confirmed that none of the SLN biopsies was false-negative. CONCLUSION Our CT criteria were highly accurate for identification and diagnostic assessment of SLN and useful for evaluating the axillary status in patients with breast cancer.
Collapse
Affiliation(s)
- S Yuen
- Department of Radiology, Kyoto Prefectural University of Medicine, Kamigyou, Kyoto, Japan
| | | | | | | | | | | | | |
Collapse
|
37
|
Yuen S, Sawai K, Ushijima Y, Okuyama C, Yamagami T, Yamada K, Nishimura T. Evaluation of axillary status in breast cancer. CT-based determination of sentinel lymph node size. Acta Radiol 2002; 43:579-86. [PMID: 12485255 DOI: 10.1080/j.1600-0455.2002.430608.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
PURPOSE To determine whether the location and size of sentinel lymph nodes (SLN) on CT are predictive of the axillary lymph node status in patients with breast cancer. MATERIAL AND METHODS Forty patients with confirmed breast cancer underwent 5-mm CT of both breasts and axillae and the most inferior lymph node in the affected axilla was designated the SLN. Based on CT assessment of the axillary lymph node status, 22 (55%) patients then underwent dye- and gamma probe (DGP)-guided SLN biopsy followed by axillary dissection; 18 (45%) underwent dissection without prior SLN biopsy. The localization and status of the SLN determined on CT and by DGP-guided biopsy were compared. Biopsied and excised nodes were subjected to histopathologic examinations. RESULTS All SLN identified on CT were close to the lateral thoracic artery and their localization corresponded well with SLN identified by the DGP-guided method. The positive predictive value of CT diagnosis was 100%. Histopathologic examination of excised nodes confirmed that none of the SLN biopsies was false-negative. CONCLUSION Our CT criteria were highly accurate for identification and diagnostic assessment of SLN and useful for evaluating the axillary status in patients with breast cancer.
Collapse
Affiliation(s)
- S Yuen
- Department of Radiology, Kyoto Prefectural University of Medicine, Kamigyou, Kyoto, Japan
| | | | | | | | | | | | | |
Collapse
|
38
|
Okuyama C, Sakane N, Yoshida T, Shima K, Kurosawa H, Kumamoto K, Ushijima Y, Nishimura T. (123)I- or (125)I-metaiodobenzylguanidine visualization of brown adipose tissue. J Nucl Med 2002; 43:1234-40. [PMID: 12215564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023] Open
Abstract
UNLABELLED (123)I-Metaiodobenzylguanidine (MIBG) accumulations that do not correspond to any tumor are observed occasionally on the medial aspect of the upper back or shoulder of children. The true nature of such accumulations is unknown, and we hypothesized that they represent interscapular brown adipose tissue (IBAT) visualized by scintigraphy. METHODS Wistar rats (7 wk old) received MIBG labeled with (123)I or (125)I. Autoradiography was performed, and concentrations of the tracer in the interscapular subcutaneous tissue were identified histopathologically. The effects of 6-hydroxydopamine, reserpine, and beta 3-adrenergic receptor agonist (CL316,243) on the accumulation were investigated to elucidate the mechanism of uptake into BAT. RESULTS Autoradiography showed well-defined distinct accumulation in the subcutaneous tissue on the upper back, and hematoxylin-eosin and anti-uncoupling protein 1 antibody staining confirmed that it was BAT. The percentage injected dose per gram in BAT was as high as that in the heart and was quite different from the concentration in white adipose tissue. Preadministration of 6-hydroxydopamine or reserpine resulted in lower MIBG concentrations in BAT. Activation of the beta 3-adrenergic receptor accelerated the washout of MIBG in BAT and caused an increase in concentration in white adipose tissue. CONCLUSION MIBG accumulates in the adrenergic nervous system in BAT, and IBAT is distinguished from the surrounding white adipose tissue. To our knowledge, BAT has not been visualized previously. We showed that MIBG scintigraphy might be suitable for the investigation of BAT and treatment of human obesity.
Collapse
Affiliation(s)
- Chio Okuyama
- Department of Radiology, Kyoto Prefectural University of Medicine, Kyoto, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Ushijima Y, Okuyama C, Mori S, Nakamura T, Kubota T, Nishimura T. Relationship between cognitive function and regional cerebral blood flow in Alzheimer's disease. Nucl Med Commun 2002; 23:779-84. [PMID: 12124484 DOI: 10.1097/00006231-200208000-00012] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The Mini-Mental State examination (MMSE) is frequently used to assess the cognitive function of neurological patients. The purpose of this study was to investigate associations between regional cerebral blood flow (rCBF) and MMSE scores in Alzheimer's disease (AD) and localization of cognitive functions. Fifty-nine patients with probable AD (21 males and 38 females; mean age 74 years) and 12 normal volunteers (five males and seven females; mean age 73 years) were studied. CBF was measured by SPECT using the N-isopropyl-p-[(123)I]iodoamphetamine autoradiography method. The CBF images were reconstructed in parallel with the orbitomeatal line and parallel to the long axis of the temporal cortex. Regions of interest were set in the cerebral and cerebellar cortex. Multivariate analysis was performed by the step-wise method, using each section of the MMSE as the dependent variable and the rCBF ratio as the independent variable. The decline in rCBF in the parietal cortex and hippocampus reflected disorientation, and the most significant cortex affecting scores on each section of the MMSE were found to be the anterior temporal cortex for registration, the frontal cortex for attention and calculation, the medial temporal cortex for recall, and the posterior temporal cortex for language.
Collapse
Affiliation(s)
- Yo Ushijima
- Department of Radiology, Kyoto Prefectural University of Medicine, 465 Kaiji-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
| | | | | | | | | | | |
Collapse
|
40
|
Okuyama C, Ushijima Y, Kubota T, Nakamura T, Kikkawa M, Nishimura T. Utility of follow-up studies using meta-[123 I]iodobenzylguanidine scintigraphy for detecting recurrent neuroblastoma. Nucl Med Commun 2002; 23:663-72. [PMID: 12089489 DOI: 10.1097/00006231-200207000-00011] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Neuroblastomas sometimes recur after the initial disappearance of the tumour. We evaluated the utility of meta-[123I]iodobenzylguanidine (123I-MIBG) scintigraphy for the detection of recurrent neuroblastomas by comparing with the measurement of biochemical markers and clinical findings. Forty patients who had received treatment for neuroblastomas were included in the study. After the disappearance of the initial tumours, periodic measurements of urinary vanillyl mandelic acid, homovanillic acid and serum neuron specific enolase values, and an 123I-MIBG scintigraphy were performed. Whenever an abnormal finding was observed, other appropriate examinations and/or follow-up examinations were performed to elucidate the true state of the patient. Eleven recurrent episodes in eight patients were observed. Most of them occurred in the bone marrow or bone. Corresponding symptoms were observed in only two episodes; the other episodes were asymptomatic, and discovered by the periodic examinations. 123I-MIBG scintigrams visualized the recurrent tumours in 10 (91%) episodes. Elevated tumour markers were observed in only three episodes. 123I-MIBG scintigrams visualized most of the recurrent tumours, unless they were accompanied by any symptoms or elevations in biochemical tumour markers. Periodic examinations with 123I-MIBG scintigraphy appears to be a useful technique for the detection of the recurrences.
Collapse
Affiliation(s)
- C Okuyama
- Department of Radiology, Kyoto Prefectural University of Medicine, Kyoto, Japan.
| | | | | | | | | | | |
Collapse
|
41
|
Yamagami T, Nakamura T, Iida S, Kato T, Tanaka O, Matsushima S, Ito H, Okuyama C, Ushijima Y, Shiga K, Nishimura T. Hepatic encephalopathy secondary to intrahepatic portosystemic venous shunt: balloon-occluded retrograde transvenous embolization with n-butyl cyanoacrylate and microcoils. Cardiovasc Intervent Radiol 2002; 25:219-21. [PMID: 12058220 DOI: 10.1007/s00270-001-0110-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We report a 70-year-old woman with hepatic encephalopathy due to an intrahepatic portosystemic venous shunt that was successfully occluded by percutaneous transcatheter embolization with n-butyl cyanoacrylate and microcoils.
Collapse
Affiliation(s)
- Takuji Yamagami
- Department of Radiology and Neurology, Kyoto Prefectural University of Medicine, 465 Kajii-chyo, Kawaramachi-Hirokoji, Kamigyo, Kyoto 602-8566, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Abstract
PURPOSE N-isopropyl-p[I-123]iodoamphetamin (IMP) is transiently taken up by the lungs after intravenous injection and its concentration in arterial blood varies depending on the degree of I-123 IMP uptake and subsequent washout. A method that does not require arterial blood sampling would be valuable to measure cerebral blood flow (CBF) using I-123 IMP. METHODS The authors developed a new theory and a convenient new method of CBF determination using I-123 IMP that does not require blood sampling. Dynamic images of the head and chest were acquired immediately after intravenous injection of I-123 IMP in a series of 42 consecutive patients with cerebrovascular disorders or other brain diseases (31 men, 11 women; mean age, 58 +/- 11 years). Changes in the I-123 IMP counts of the regions of interest set in the head and pulmonary trunk were analyzed by the graph plot method, and the F values (CBF index slope) determined were compared with the mean CBF levels obtained by simultaneous autoradiography. RESULT The F values correlated well with the mean CBF obtained by autoradiography (r = 0.818, P < 0.001). CONCLUSIONS This innovative I-123 IMP graph plot analysis method using the time-activity curve of the head and pulmonary trunk alone is a noninvasive, convenient way to measure CBF. It is expected to become the most useful clinical technique for measuring CBF with I-123 IMP. This method can be used for patient follow-up and for comparing different patient groups evaluated in regional CBF studies.
Collapse
Affiliation(s)
- Kunio Okamoto
- Department of Radiology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | | | | | | | | |
Collapse
|
43
|
Kubota T, Ushijima Y, Okuyama C, Kubo T, Nishimura T. Tracer accumulation in femoral head during early phase of bone scintigraphy after renal transplantation. J Nucl Med 2001; 42:1789-94. [PMID: 11752074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
UNLABELLED Nontraumatic osteonecrosis of the femoral head (ONF) is a complication of renal transplantation. The pathogenic mechanism of ONF is thought to be an ischemic event. The purpose of this study was to investigate whether 3-phase bone scintigraphy can reveal early hemodynamic changes associated with ONF after renal transplantation. METHODS We performed 3-phase bone scintigraphy on 19 renal allograft recipients between 3 and 9 wk after they underwent renal transplantation. Regions of interest (ROI) were assigned bilaterally in the femoral heads, diaphyses, and soft tissue. The head-to-diaphysis ratio (HD) in each phase was then calculated. RESULTS ONF occurred in 8 femoral heads of 4 patients. Three of the 4 ONF patients had no abnormal MRI findings at the time of bone scintigraphy. In phase 1, no significant difference in HDs was observed between the ONF patients (mean HD +/- SD, 0.62 +/- 0.44) and the non-ONF patients (0.31 +/- 1.40). The difference between the mean counts for bone and soft tissue was small in both instances, and the HD had a large dispersion. In phase 2, the HDs for the ONF patients (0.70 +/- 0.27) and the non-ONF patients (1.31 +/- 0.43) were significantly different (P = 0.0005). The HD was <1.00 in all femoral heads of the ONF patients, whereas 9 non-ONF heads had an HD that was <1.00. In phase 3, the HD of the ONF patients was significantly lower than that of the non-ONF patients (ONF patients, 0.92 +/- 0.17; non-ONF patients, 1.62 +/- 0.46; P = 0.0002). CONCLUSION All ONF patients were in the group with a low HD in phase 2, suggesting a reduction in blood flow or blood pool. Phase 2 accumulation in 3-phase bone scintigraphy can be used to estimate early hemodynamic changes in patients with ONF after renal transplantation.
Collapse
Affiliation(s)
- T Kubota
- Department of Radiology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | | | | | | | | |
Collapse
|
44
|
Kikkawa M, Nakamura T, Sakamoto K, Sugihara H, Azuma A, Sawada T, Okuyama C, Ushijima Y, Nishimura T. Assessment of left ventricular diastolic function from quantitative electrocardiographic-gated 99m Tc-tetrofosmin myocardial SPET. Eur J Nucl Med Mol Imaging 2001. [DOI: 10.1007/s002590100610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
45
|
Asao H, Okuyama C, Kumaki S, Ishii N, Tsuchiya S, Foster D, Sugamura K. Cutting edge: the common gamma-chain is an indispensable subunit of the IL-21 receptor complex. J Immunol 2001; 167:1-5. [PMID: 11418623 DOI: 10.4049/jimmunol.167.1.1] [Citation(s) in RCA: 391] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The common gamma-chain (gamma(c)) is an indispensable subunit of the functional receptor complexes for IL-4, IL-7, IL-9, and IL-15 as well as IL-2. Here we show that the gamma(c) is also shared with the IL-21R complex. Although IL-21 binds to the IL-21R expressed on gamma(c)-deficient ED40515(-) cells, IL-21 is unable to transduce any intracytoplasmic signals. However, in EDgamma-16 cells, a gamma(c)-transfected ED40515(-) cell line, IL-21 binds to the IL-21R and can activate Janus kinase (JAK)1, JAK3, STAT1, and STAT3. The chemical cross-linking study reveals the direct binding of IL-21 to the gamma(c). These data clearly demonstrate that the gamma(c) is an indispensable subunit of the functional IL-21R complex.
Collapse
Affiliation(s)
- H Asao
- Department of Microbiology and Immunology, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | | | | | | | | | | | | |
Collapse
|
46
|
Okuyama C, Ushijima Y, Nakamura T, Nishimura T. Pseudoneuroblastoma demonstrated by I-123 MIBG SPECT. Clin Nucl Med 2001; 26:474-5. [PMID: 11317042 DOI: 10.1097/00003072-200105000-00029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- C Okuyama
- Department of Radiology, Kyoto Prefectural University of Medicine, 465 Kajiicho Kawaramachi Hirokoji, Kamigyo-ku, Kyoto City 602-8566, Japan.
| | | | | | | |
Collapse
|
47
|
Kikkawa M, Nakamura T, Sakamoto K, Sugihara H, Azuma A, Sawada T, Okuyama C, Ushijima Y, Nishimura T. Assessment of left ventricular diastolic function from quantitative electrocardiographic-gated 99mTc-tetrofosmin myocardial SPET. Eur J Nucl Med 2001; 28:593-601. [PMID: 11383864 DOI: 10.1007/s002590100487] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have developed new software which can evaluate left ventricular (LV) diastolic functional parameters from a quantitative gated SPET (QGS) program. To examine its accuracy, we compared these findings with the LV diastolic functional indices obtained from gated radionuclide ventriculography (RNV). Twenty-four patients were selected for this study. Gated SPET with technetium-99m tetrofosmin was performed and the QGS program was used with a temporal resolution of 32 frames per R-R interval. The LV volume of each frame was calculated and four harmonics of Fourier series were retained for the analysis of the LV volume curve. From this fitted curve and its first derivative curve, we derived LV systolic functional indices, e.g. ejection fraction (EF), peak ejection rate (PER) and time to PER (TPER), as well as LV diastolic functional variables, e.g. 1/3 filling fraction (1/3 FF), peak filling rate (PFR) and time to PFR (TPFR). Within 5+/-2 days, gated RNV was performed and diastolic functional parameters were determined by the same method. No significant difference was observed between the variables calculated by gated SPET and by gated RNV. There was a good correlation between EF, PER, TPER, 1/3 FF, PFR and TPFR determined by these two methods (EF: r=0.95, P<0.0001; PER: r=0.87, P<0.0001; TPER: r=0.84, P<0.0001; 1/3 FF: r=0.87, P<0.0001; PFR: r=0.92, P<0.0001; TPFR: r=0.89, P<0.0001). Bland-Altman plots did not reveal any significant degree of directional measurement bias in any of the comparisons of gated SPET data and RNV data. It is concluded that, in addition to the conventional LV systolic functional indices, our program accurately provides LV diastolic functional parameters from gated SPET. Also, this program will be useful for detecting LV diastolic dysfunction in various cardiac diseases before LV systolic dysfunction becomes evident.
Collapse
Affiliation(s)
- M Kikkawa
- Department of Radiology, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Okuyama C, Ushijima Y, Watanabe K, Nakamura T, Nishimura T. Diffuse Tl-201 accumulation in an irradiated area. Clin Nucl Med 2001; 26:369-71. [PMID: 11290914 DOI: 10.1097/00003072-200104000-00031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- C Okuyama
- Department of Radiology, Kyoto Prefectural University of Medicine, Kyoto City, Japan.
| | | | | | | | | |
Collapse
|
49
|
Okuyama C, Ushuima Y, Nakamura T, Kikkawa M, Nishimura T. Thallium-201 scintigraphy of neuroblastoma: different results for primary tumors and skeletal lesions. Ann Nucl Med 2001; 15:171-7. [PMID: 11448079 DOI: 10.1007/bf02988612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Thallium-201 scintigraphy was performed in 8 children with neuroblastoma, and uptake by the tumors was evaluated in comparison with the results of 123I-MIBG scintigraphy. No primary tumors or metastatic lymph nodes showed 201Tl accumulation, but in 4 cases of bone marrow metastases accompanied by focal cortical invasion, the metastatic lesion was demonstrated more clearly on the early image than on the delayed image. In another case of bone metastases infiltrating cortical bone revealed by 123I-MIBG scintigraphy and biopsy before treatment, 201Tl scintigraphy performed after chemotherapy showed abnormal accumulation in the tibia, but the second 123I-MIBG scintigraphy performed 1 week after the 201Tl scintigraphy showed no abnormal uptake. 201Tl does not appear to have good affinity for neuroblastoma, but it accumulates in metastatic skeletal lesions. A reactive hypermetabolic bone marrow, and/or inflammatory process and periosteal reaction due to the presence of metastatic foci may have induced the 201Tl accumulation. It seems that 201Tl is not useful for the diagnosis. Nevertheless, the discordance between 201Tl uptake in primary tumors and skeletal lesions allows speculation on the mechanism of 201Tl accumulation in skeletons.
Collapse
Affiliation(s)
- C Okuyama
- Department of Radiology, Kyoto Prefectural University of Medicine, Japan.
| | | | | | | | | |
Collapse
|
50
|
Okuyama C, Ushijima Y, Kikkawa M, Yamagami T, Nakamura T, Kobayashi K, Hirota T, Nishimura T. False-positive I-131 accumulation in a liver cyst in a patient with thyroid carcinoma. Clin Nucl Med 2001; 26:198-201. [PMID: 11245109 DOI: 10.1097/00003072-200103000-00003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Iodine-131 uptake was seen in the right upper abdominal quadrant of a patient with postoperative differentiated thyroid cancer that corresponded with a large liver cyst.
Collapse
Affiliation(s)
- C Okuyama
- Department of Radiology, Kyoto Prefectural University of Medicine, Kyoto City, Japan.
| | | | | | | | | | | | | | | |
Collapse
|