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Kooijman J, Van Riel W, Prinsen M, Dylus J, Grobben Y, De Roos J, Melis J, De Bitter T, Narumi Y, Kawase Y, Willemsen-Seegers N, Zaman G. 30P Comparative biochemical and cellular profiling of kinase inhibitors approved for clinical use from 2018 to 2020. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.01.039] [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: 11/01/2022] Open
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2
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Hamada T, Komori T, Tanaka Y, Juri H, Higashiyama A, Narumi Y. Comparison of sensitivity in detection of sentinel lymph nodes in preoperative breast cancer; lymphoscintigraphy planar images v.s fusion SPECT/preorperative CT images. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx141.007] [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: 11/14/2022] Open
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3
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Yoshida K, Yamazaki H, Takenaka T, Kotsuma T, Masui K, Komori T, Shimbo T, Yoshikawa N, Yoshioka H, Uesugi Y, Hamada T, Nakata M, Matsutani H, Ueda M, Tsujimoto Y, Tanaka E, Narumi Y. PO-0937: HDR image-guided interstitial brachytherapy for postoperative local recurrent uterine cancer. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31374-9] [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: 10/19/2022]
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4
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Shimbo T, Yoshida K, Yoshikawa N, Yoshioka H, Nakata M, Narumi Y, Komori T, Matsutani H, Hamada T, Uesugi Y. EP-1162: Non surgical breast conserving treatment using a new radiosensitizer. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31598-0] [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: 10/19/2022]
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5
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Murakami T, Kim T, Hori M, Takamura M, Tsuda K, Takahashi S, Narumi Y, Nakamura H. Multishot Echo-Planar Imaging with Gadopentetate Dimeglumine: Preliminary study of efficacy for detection of hypovascular metastatic liver tumors. Acta Radiol 2016. [DOI: 10.1080/028418500127345217] [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: 10/26/2022]
Abstract
Objective: To evaluate the usefulness of sequential T2-weighted spin-echo type multishot echo-planar (T2-EP) imaging with gadopentetate dimeglumine for the detection of hypovascular metastatic liver tumors. Material and Methods: Fifteen consecutive patients with 56 proven hypovascular metastatic liver tumors were included in the study. Three observers blindly and independently read the whole-liver images obtained with T2-weighted spin-echo, T2-weighted single-shot fast spin-echo, T1-weighted fast multiplanar spoiled GRASS and T2-EP images obtained before and 25, 60, 90 and 120 s after injection of 0.2 mmol/kg b.w. of gadopentetate dimeglumine. The diagnostic accuracy was estimated by calculating the area under the observer-specific binomial receiver operating characteristics curves (Az). Results: T2-EP images obtained 60 s after contrast injection showed significantly higher contrast-to-noise (C/N) ratios than the other imaging techniques. A combination of all phases of the T2-EP images produced the highest sensitivity and specificity. In terms of the Az value, the diagnostic accuracy for tumor detection achieved with a combination of all phases of the T2-EP images was significantly higher than that with T1-SPGR and T2-SSFSE images ( p < 0.01). The Az values of the T2-EP images (Az = 0.975) were higher than those of T2-CSE images (Az = 0.948), but the difference was not significant. Conclusion: Our preliminary study revealed that sequential imaging with enhanced T2-EP images was useful for the detection of hypovascular metastatic liver tumors because of its superior C/N ratio and sensitivity.
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Affiliation(s)
- T. Murakami
- Department of Radiology, Osaka University Medical School, Osaka, Japan
| | - T. Kim
- Department of Radiology, Osaka University Medical School, Osaka, Japan
| | - M. Hori
- Department of Radiology, Osaka University Medical School, Osaka, Japan
| | - M. Takamura
- Department of Radiology, Osaka University Medical School, Osaka, Japan
| | - K. Tsuda
- Department of Radiology, Osaka University Medical School, Osaka, Japan
| | - S. Takahashi
- Department of Radiology, Osaka University Medical School, Osaka, Japan
| | - Y. Narumi
- Department of Radiology, Osaka University Medical School, Osaka, Japan
| | - H. Nakamura
- Department of Radiology, Osaka University Medical School, Osaka, Japan
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Yoshida K, Yamazaki H, Takenaka T, Kotsuma T, Masui K, Akiyama H, Uesugi Y, Shimbo T, Yoshikawa N, Yoshioka H, Tanaka E, Narumi Y. PO-0964: High-dose-rate interstitial brachytherapy as monotherapy for locally limited mobile tongue cancer. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32214-9] [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: 10/21/2022]
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7
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Yoshikawa N, Yoshioka H, Yoshida K, Shimbo T, Uesugi Y, Narumi Y. EP-1476: General fatigue during the period of radiotherapy; clinical usefulness of Japanese herbal medicine. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32726-8] [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: 10/21/2022]
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Yoshikawa N, Shimbo T, Yoshioka H, Yoshida K, Uesugi Y, Narumi Y. PO-0663: Treatment result of primary thyroid lymphoma; a single institute experience. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)31913-2] [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: 10/21/2022]
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Komori T, Shimbo T, Higashiyama A, Tanaka Y, Narumi Y. 2723 Diagnostic performance of image fusion software (PET/CT and MRI) in patients with abdominal or pelvic lesions. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31490-3] [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: 10/22/2022]
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10
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Hamada T, Shinbo T, Yoshikawa N, Yoshioka H, Tanaka Y, Yoshida K, Uesugi Y, Komori T, Narumi Y. 1844 Preliminary treatment results of new hypoxic radiosensitizer ’KORTUC’ (Kochi oxydol-radiation therapy for unresectable carcinomas) containing hydrogen peroxide and sodium hyaluronate for massive unresectable locally advanced breast cancer. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30794-8] [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: 11/17/2022]
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Yoshida K, Yamazaki H, Takenaka T, Kotsuma T, Masui K, Uesugi Y, Shimbo T, Yoshioka H, Tanaka E, Narumi Y. PO-1028: High-dose-rate interstitial brachytherapy as monotherapy with hormone therapy for high-risk prostate cancer. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31146-4] [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: 11/30/2022]
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12
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Shimbo T, Yoshikawa N, Yoshioka H, Yoshida K, Uesugi Y, Narumi Y. EP-1382: Clinical efficacy of Denosumab combined with external beam radiotherapy for metastatic bone tumor. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31500-0] [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: 12/01/2022]
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Yoshikawa N, Yoshioka H, Shimbo T, Yoshida K, Uesugi Y, Narumi Y. EP-1221: Effectiveness of hypofractionated whole breast irradiation after partial mastectomy in Japanese patients. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31339-6] [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: 11/28/2022]
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Yoshikawa N, Shimbo T, Yoshioka Y, Yoshida K, Uesugi Y, Narumi Y. Sivelestat Sodium Hydrate Reduces Radiation-Induced Lung Injury in Mice by Inhibiting Neutrophil Elastase. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1695] [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: 11/28/2022]
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Tsurusaki Y, Kosho T, Hatasaki K, Narumi Y, Wakui K, Fukushima Y, Doi H, Saitsu H, Miyake N, Matsumoto N. Exome sequencing in a family with an X-linked lethal malformation syndrome: clinical consequences of hemizygous truncating OFD1 mutations in male patients. Clin Genet 2012; 83:135-44. [PMID: 22548404 DOI: 10.1111/j.1399-0004.2012.01885.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Oral-facial-digital syndrome type 1 (OFD1; OMIM #311200) is an X-linked dominant disorder, caused by heterozygous mutations in the OFD1 gene and characterized by facial anomalies, abnormalities in oral tissues, digits, brain, and kidney; and male lethality in the first or second trimester pregnancy. We encountered a family with three affected male neonates having an 'unclassified' X-linked lethal congenital malformation syndrome. Exome sequencing of entire transcripts of the whole X chromosome has identified a novel splicing mutation (c.2388+1G > C) in intron 17 of OFD1, resulting in a premature stop codon at amino acid position 796. The affected males manifested severe multisystem complications in addition to the cardinal features of OFD1 and the carrier female showed only subtle features of OFD1. The present patients and the previously reported male patients from four families (clinical OFD1; Simpson-Golabi-Behmel syndrome, type 2 with an OFD1 mutation; Joubert syndrome-10 with OFD1 mutations) would belong to a single syndrome spectrum caused by truncating OFD1 mutations, presenting with craniofacial features (macrocephaly, depressed or broad nasal bridge, and lip abnormalities), postaxial polydactyly, respiratory insufficiency with recurrent respiratory tract infections in survivors, severe mental or developmental retardation, and brain malformations (hypoplasia or agenesis of corpus callosum and/or cerebellar vermis and posterior fossa abnormalities).
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Affiliation(s)
- Y Tsurusaki
- Department of Human Genetics, Yokohama City Graduate School of Medicine, Yokohama, Japan
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Princep AJ, Mulders AM, Schierle E, Weschke E, Hester J, Hutchison WD, Tanaka Y, Terada N, Narumi Y, Nakamura T. High-order Ho multipoles in HoB2C2 observed with soft resonant x-ray diffraction. J Phys Condens Matter 2012; 24:075602. [PMID: 22301486 DOI: 10.1088/0953-8984/24/7/075602] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Soft resonant x-ray Bragg diffraction (SRXD) at the Ho M4,5 edges has been used to study Ho 4f multipoles in the combined magnetic and orbitally ordered phase of HoB2C2. A full description of the energy dependence for both σ and π incident x-rays at two different azimuthal angles, as well as the ratio I(σ)/I(π) as a function of azimuthal angle for a selection of energies, allows a determination of the higher order multipole moments of rank 1 (dipole) to 6 (hexacontatetrapole). The Ho 4f multipole moments have been estimated, indicating a dominant hexadecapole (rank 4) order with an almost negligible influence from either the dipole or the octupole magnetic terms. The analysis incorporates both the intra-atomic magnetic and quadrupolar interactions between the 3d core and 4f valence shells as well as the interference of contributions to the scattering that behave differently under time reversal. Comparison of SRXD, neutron diffraction and non-resonant x-ray diffraction shows that the magnetic and quadrupolar order parameters are distinct. The (00½) component of the magnetic order exhibits a Brillouin type increase below the orbital ordering temperature T(Q), while the quadrupolar order increases more sharply. We conclude that the quadrupolar interaction is strong, but quadrupolar order only occurs when the magnetic order gives rise to a quasi-doublet ground state, which results in a lock-in of the orbitals at T(Q).
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Affiliation(s)
- A J Princep
- School of PEMS, UNSW, Canberra, ACT, 2600, Australia
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Tatsugami F, Matsuki M, Nakai G, Inada Y, Kanazawa S, Takeda Y, Morita H, Takada H, Yoshikawa S, Fukumura K, Narumi Y. The effect of adaptive iterative dose reduction on image quality in 320-detector row CT coronary angiography. Br J Radiol 2012; 85:e378-82. [PMID: 22253355 DOI: 10.1259/bjr/10084599] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To evaluate the effect of adaptive iterative dose reduction (AIDR) on image noise and image quality as compared with standard filtered back projection (FBP) in 320-detector row CT coronary angiography (CTCA). METHODS 50 patients (14 females, mean age 68 ± 9 years) who underwent CTCA (100 kV or 120 kV, 400-580 mA) within a single heartbeat were enrolled. Studies were reconstructed with FBP and subsequently AIDR. Image noise, vessel contrast and contrast-to-noise ratio (CNR) in the coronary arteries were evaluated. Overall image quality for coronary arteries was assessed using a five-point scale (1, non-diagnostic; 5, excellent). RESULTS All the examinations were performed in a single heartbeat. Image noise in the aorta was significantly lower in data sets reconstructed with AIDR than in those reconstructed with FBP (21.4 ± 3.1 HU vs 36.9 ± 4.5 HU; p<0.001). No significant differences were observed between FBP and AIDR for the mean vessel contrast (HU) in the proximal coronary arteries. Consequently, CNRs in the proximal coronary arteries were higher in the AIDR group than in the FBP group (p<0.001). The mean image quality score was improved by AIDR (3.75 ± 0.38 vs 4.24 ± 0.38; p<0.001). CONCLUSION The use of AIDR reduces image noise and improves image quality in 320-detector row CTCA.
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Affiliation(s)
- F Tatsugami
- Department of Radiology, Osaka Medical College, Takatsuki City, Osaka, Japan.
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Kitada A, Tsujimoto Y, Yamamoto T, Kobayashi Y, Narumi Y, Kindo K, Aczel A, Luke G, Uemura Y, Kiuchi Y, Ueda Y, Yoshimura K, Ajiro Y, Kageyama H. Quadruple-layered perovskite (CuCl)Ca2NaNb4O13. J SOLID STATE CHEM 2012. [DOI: 10.1016/j.jssc.2011.10.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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19
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Inomata T, Yoshikawa N, Shimbo T, Takahashi M, Uesugi Y, Narumi Y, Azuma H, Kariya S, Nishioka A, Ogawa Y. 7035 POSTER The Outcome of High Dose Rrate Brachytherapy Combined With External Beam Radiation Therapy in Patients With Prostate Cancer. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)71986-4] [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: 10/17/2022]
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20
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Kitagawa D, Gouda M, Kirii Y, Sugiyama N, Ishihama Y, Fujii I, Narumi Y, Akita K, Yokota K. Characterization of kinase inhibitors using different phosphorylation states of colony stimulating factor-1 receptor tyrosine kinase. J Biochem 2011; 151:47-55. [DOI: 10.1093/jb/mvr112] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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21
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Asano T, Inagaki Y, Ajiro Y, Matsubara H, Mukai K, Matsumoto N, Mitamura H, Goto T, Narumi Y, Kindo K, Hori H. High-Field Magnetization Process in Free Radical and Metal-Assembled Molecular Magnets. ACTA ACUST UNITED AC 2011. [DOI: 10.1080/10587250008023511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- T. Asano
- a Department of Physics , Kyushu University , Fukuoka , 812-8581 , Japan
| | - Y. Inagaki
- a Department of Physics , Kyushu University , Fukuoka , 812-8581 , Japan
| | - Y. Ajiro
- a Department of Physics , Kyushu University , Fukuoka , 812-8581 , Japan
| | - H. Matsubara
- b Department of Chemistry , Ehime University , Matsuyama , 790-8577 , Japan
| | - K. Mukai
- b Department of Chemistry , Ehime University , Matsuyama , 790-8577 , Japan
| | - N. Matsumoto
- c Department of Chemistry , Kumamoto Universitty , Kumamoto , 860-8555 , Japan
| | - H. Mitamura
- d Institute for Solid State Physics (ISSP), University of Tokyo , Kashiva , 277-8581 , Japan
| | - T. Goto
- d Institute for Solid State Physics (ISSP), University of Tokyo , Kashiva , 277-8581 , Japan
| | - Y. Narumi
- e Research Center for Materials Science at Extreme Conditions (KYOKUGEN) , Osaka University , Toyonaka , 560-8531 , Japan
| | - K. Kindo
- e Research Center for Materials Science at Extreme Conditions (KYOKUGEN) , Osaka University , Toyonaka , 560-8531 , Japan
| | - H. Hori
- f School of Materials Science, Japan Advanced Institute of Science and Technology , Tatsunokuchi , 923-1292 , Japan
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Mitsuda A, Okuma T, Sato K, Suga K, Narumi Y, Kindo K, Wada H. Pressure and magnetic field dependence of valence and magnetic transitions in EuPtP. J Phys Condens Matter 2010; 22:226003. [PMID: 21393754 DOI: 10.1088/0953-8984/22/22/226003] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The hexagonal layered compound, EuPtP, exhibits two valence transitions, at T₁ = 235 K and T₂ = 190 K, and an antiferromagnetic order at T(N) = 8.6 K. We have examined the effects of magnetic field and pressure, and the specific heat. Analysis of the high-field experiments confirms that half of Eu are in a divalent state at the lowest temperature, and that the number of Eu(² + ) increases discontinuously at T₂ and T₁ with increasing temperature. The magnetic entropy reaches ~ 22 J K⁻¹ mol⁻¹ at room temperature, which is larger than that expected for J = 7/2 of Eu(²+ ) (17.3 J K⁻¹ mol⁻¹). This is in good agreement with the magnetic entropy deduced from the interconfigurational fluctuation model, which explains the valence transition in Eu(Pd(₁- x)Pt(x))₂Si₂. The application of pressure shifts T₁ and T₂ higher and suppresses the intermediate phase (β phase, T₂ < T < T₁), whereas it does not change the properties of the low-temperature phase (γ phase, T < T₂) and the T(N).
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Affiliation(s)
- A Mitsuda
- Department of Physics, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.
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Yuki M, Narumi Y, Fujita O, Yamamura K. CMR2009: 3.05: Diffusion-weighted MR imaging of pancreas using manganese oral contrast agent. Contrast Media Mol Imaging 2009. [DOI: 10.1002/cmmi.311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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24
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Takahashi S, Takamura M, Yamamoto S, Kudo M, Narumi Y, Murakami T, Nakamura H. Technical optimization of four-channel multidetector-row helical computed tomography for depicting arterial stenosis: a phantom study. Acta Radiol 2007; 48:173-9. [PMID: 17354138 DOI: 10.1080/02841850601067645] [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: 10/23/2022]
Abstract
PURPOSE To determine the effects of detector configuration, as well as vessel orientation, on the depiction accuracy of arterial stenosis using four-channel multidetector-row helical computed tomography (MDCT) angiography in vitro. MATERIAL AND METHODS Five acrylic vessel phantoms (3 mm in diameter with 25 or 50% stenosis, or 5 mm with 25, 50, or 75% stenosis) were scanned with a four-channel MDCT scanner at five vessel orientations (0, 30, 45, 60, and 90 degrees to the z-axis) using 4 x 1.25, 2.5, 3.75, and 5.0-mm detector configurations at beam pitches of 0.75 and 1.5. The percentage of stenosis was calculated by the ratio of the full width at half maximum for stenotic and non-stenotic portions of the phantom, and compared to the actual known values. RESULTS A detector configuration of 4 x 1.25 mm provided good reproducibility, as well as high accuracy for assessing vessel stenosis, while a 4 x 2.5-mm or wider detector configuration caused underestimations of stenosis. Although the phantoms perpendicular to the z-axis were underestimated, the errors were kept in clinically acceptable ranges using the 4 x 1.25-mm detector configuration. CONCLUSION Four-channel MDCT accurately discerns stenosis for vessel phantoms of 3 or 5 mm in diameter at any orientation when using a detector configuration of 4 x 1.25 mm.
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Affiliation(s)
- S Takahashi
- Department of Clinical Informative Imageology, Osaka University Graduate School of Medicine, Osaka, Japan.
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Kimura S, Hagiwara M, Ueda H, Narumi Y, Kindo K, Yashiro H, Kashiwagi T, Takagi H. Observation of higher-harmonic helical spin-resonance modes in the chromium spinel CdCr2O4. Phys Rev Lett 2006; 97:257202. [PMID: 17280386 DOI: 10.1103/physrevlett.97.257202] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2005] [Revised: 08/04/2006] [Indexed: 05/13/2023]
Abstract
High frequency ESR measurements on the chromium spinel compound CdCr2O4 have been performed. The observed ESR modes below Hc' approximately 5.7 T can be explained well by the calculated resonance modes based on a molecular field theory assuming a helical spin structure. Other than the fundamental ones, we have succeeded in observing the higher-harmonic modes for the first time. A large change of the ESR modes above Hc' indicate that a variation of the spin structure from the helical to the four-sublattice canted one takes place around Hc'.
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Affiliation(s)
- S Kimura
- KYOKUGEN, Osaka University, Machikaneyama 1-3, Toyanaka 560-8531, Japan
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26
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Narumi Y, Kindo K, Katsumata K, Kawauchi M, Broennimann C, Staub U, Toyokawa H, Tanaka Y, Kikkawa A, Yamamoto T, Hagiwara M, Ishikawa T, Kitamura H. X-ray diffractometer combining synchrotron radiation and pulsed magnetic fields up to 40 T. J Synchrotron Radiat 2006; 13:271-4. [PMID: 16645253 DOI: 10.1107/s0909049506006972] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2005] [Accepted: 02/24/2006] [Indexed: 05/08/2023]
Abstract
A synchrotron X-ray diffractometer incorporating a pulsed field magnet for high fields up to 40 T has been developed and a detailed description of this instrument is reported. The pulsed field magnet is composed of two coaxial coils with a gap of 3 mm at the mid-plane for passage of the X-rays. The pixel detector PILATUS 100K is used to store the diffracted X-rays. As a test of this instrument, X-ray diffraction by a powder sample of the antiferromagnet CoO is measured below the Néel temperature. A field-dependent lattice distortion of CoO due to magnetostriction is observed up to 38 T.
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Affiliation(s)
- Y Narumi
- ISSP, University of Tokyo, Kashiwa, Chiba 277-858, Japan.
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27
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Nakazawa K, Narumi Y, Ishikawa S, Yokoyama K, Nishikage T, Nagai K, Kawano T, Makita K. Effect of prostaglandin E1 on inflammatory responses and gas exchange in patients undergoing surgery for oesophageal cancer. Br J Anaesth 2004; 93:199-203. [PMID: 15169741 DOI: 10.1093/bja/aeh184] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [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: 02/04/2023] Open
Abstract
BACKGROUND Oesophageal surgery causes morbidity and mortality from respiratory complications. We tested the possibility that prostaglandin E1 (PGE1) could reduce inflammatory cytokine responses and improve gas exchange after oesophagectomy. METHODS We randomized 14 patients into two groups. One group received PGE1 20 ng kg(-1) min(-1) i.v. during anaesthesia (PGE1 group) and the other group did not (control group). Anaesthesia was maintained with sevoflurane and epidural anaesthesia. During oesophagectomy, ventilation of one lung was carried out with a double-lumen bronchial tube. The patients were extubated on or after the first postoperative day. Blood samples were taken at induction of anaesthesia, at the end of thoracotomy, at the end of the operation, 2 h after surgery and on the first day after surgery. RESULTS The groups were similar for ASA physical status, age, FEV1%, operation time, duration of thoracotomy, intraoperative fluid volume and blood loss. The arterial blood gas and arterial pressure during surgery were also similar in the PGE1 and control groups. However, the PaO2/FiO2 ratio on the first day after surgery was significantly greater in the PGE1 group compared with the control group. Serum concentrations of IL-6 and IL-8 increased after surgery in both groups. IL-6 was significantly less in the PGE1 group at the end of the operation and 2 h after the operation. CONCLUSIONS Intraoperative PGE1 reduced IL-6 production in patients undergoing oesophagectomy and oxygenation was better in the postoperative period.
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Affiliation(s)
- K Nakazawa
- Department of Anaesthesiology and Critical Care Medicine, School of Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 1138519, Japan.
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Matsuno N, Uchiyama M, Iwamoto H, Hama K, Narumi Y, Kikuchi K, Degawa H, Kozaki K, Nagao T. Machine perfusion preservation for liver transplantation from non-heart-beating donors with agonal stage. Transplant Proc 2002; 34:2610-1. [PMID: 12431543 DOI: 10.1016/s0041-1345(02)03444-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- N Matsuno
- 5th Department of Surgery, Tokyo Medical University, Hachioji, Tokyo, Japan
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29
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Kondoh H, Takeda H, Matsumura Y, Kuwata S, Yoshimura H, Narumi Y, Nakamura H, Okura Y, Inamura K, Washiashi T, Okada S. PACS linked to EPR. Stud Health Technol Inform 2002; 84:915-8. [PMID: 11604866] [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: 02/21/2023]
Abstract
We developed a new PACS linked to Electronic Patient Record system (EPR). It was a hospital-wide PACS storing all the radiological examinations. The images and reports were linked on EPR. The concept of navigation servers and segment servers was introduced for prefetchig and quick displaying. After the start of operation, increasing retrieval indicated its effectiveness on practical work in spite of remaining delivery of radiographs.
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Affiliation(s)
- H Kondoh
- Department of Medical Information Science, Tokushima University Medical Hospital, Tokushima, 770-8503, Japan.
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30
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Cruz M, Tsuda K, Narumi Y, Kuroiwa Y, Nose T, Kojima Y, Okuyama A, Takahashi S, Aozasa K, Barentsz JO, Nakamura H. Characterization of low-intensity lesions in the peripheral zone of prostate on pre-biopsy endorectal coil MR imaging. Eur Radiol 2002; 12:357-65. [PMID: 11870434 DOI: 10.1007/s003300101044] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.1] [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: 08/18/2000] [Revised: 06/08/2001] [Accepted: 06/12/2001] [Indexed: 10/28/2022]
Abstract
The aim of this study was to determine which morphological features of low-intensity lesions in the peripheral zone of the prostate are predictable of prostate cancer on pre-biopsy T2-weighted integrated endorectal phased-array MR images. The MR examinations were performed in 69 consecutive patients with elevated level of prostate-specific antigen (>4 ng/ml) and/or a positive digital rectal examination before transperineal 12-site biopsy. Two radiologists evaluated presence of lesions, their morphological features, and possibility of malignancy in divided into four sections of the peripheral zone. Imaging analysis findings were compared with biopsy results. Discriminative features were selected by stepwise logistic regression. Descriptive statistics and receiver operating characteristics (ROC) curves were also calculated. Sixty-eight benign lesions and 23 malignant lesions were found. Wedge shape and diffuse extensions without mass effect were significantly associated with benignity ( P=0.0105 and 0.002, respectively). Lesion size was significantly associated with malignancy ( P=0.0001). For evaluating probability of malignancy for lesions, regression model showed a comparable accuracy with the total impression for the readers in ROC analysis (Az 0.9095 vs 0.9266, respectively). Wedge shape, diffuse extension without mass effect, and size are the morphological features of low-intensity lesions in the peripheral zone on pre-biopsy T2-weighted MR images that give the best prediction of malignancy.
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Affiliation(s)
- M Cruz
- Department of Radiology, Osaka University Medical School, 2--2 Yamadaoka, Suita-shi, Osaka 565-0871, Japan.
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31
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Johkoh T, Honda O, Yamamoto S, Tomiyama N, Koyama M, Kozuka T, Mihara N, Hamada S, Narumi Y, Nakamura H, Kudo M. Evaluation of image quality and spatial resolution of low-dose high-pitch multidetector-row helical high-resolution CT in 11 autopsy lungs and a wire phantom. Radiat Med 2001; 19:279-84. [PMID: 11837577] [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: 02/23/2023]
Abstract
PURPOSE The aim of this study was to evaluate whether low-dose high-pitch (6:1) multidetector-row helical high-resolution CT is appropriate for the evaluation of various pulmonary abnormalities, including faint opacities. METHODS Eleven autopsy lungs were scanned with a multidetector-row CT scanner using 2.5 mm x 4 beam collimation, effective slice thickness 3 mm, 6:1 pitch, 0.8 second gantry rotation speed, 20 cm Display FOV, high spatial frequency (bone) algorithm, and various radiation doses (120 kVp; 160, 80, 40, 24, and 8 mAs). The image quality of each CT set was assessed as adequate or inadequate for diagnosis by two independent observers. In addition, a wire phantom was scanned with the same parameters in order to describe the MTF curves. RESULTS There was excellent agreement between the observers for the evaluation of image quality (kappa statistic, 0.84). The ratio of images evaluated as inadequate for 8 mAs and 24 mAs was significantly higher than that for 160, 80, and 40 mAs (p<0.01: chi-square test). MTF curves of both 8 and 24 mAs were significantly inferior to those of 40, 80, and 160 mAs (p<0.0 1, Friedman test), while the MTF curve of 40 mAs was relatively inferior to that of 160 mAs (p<0.05, Friedman test). CONCLUSION More than 40 mAs in combination with 120 kVp is preferable for the evaluation of details of lung parenchyma by high-pitch. multidetector-row helical high-resolution CT.
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Affiliation(s)
- T Johkoh
- Department of Radiology, Osaka University Medical School, Suita, Japan
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32
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Yamamoto S, Johkoh T, Mihara N, Umeda T, Azuma M, Nakanishi S, Narumi Y, Naito H, Nakamura H. Evaluation of compressed lung CT image quality using quantitative analysis. Radiat Med 2001; 19:321-9. [PMID: 11837585] [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: 02/23/2023]
Abstract
The goals of this study were (1) to evaluate the quality of compressed lung CT images obtained using high resolution CT (HRCT: 2 mm slice thickness) for degree of compression and conventional CT (10 mm slice thickness) images by using physical and subjective evaluations, and (2) to analyze the distortion of density distribution on lung CT images using histogram analysis for each compression ratio. The coding method was performed according to the Joint Photographic Experts Group (JPEG). We physically evaluated the quality of compressed lung CT images using the peak signal-to-noise ratio (PSNR) as given by the square root of the ratio of the peak value of the gray level squared to the mean square error (dB) and subjectively evaluated the CT images using the mean opinion score (MOS). The acceptable compression ratio for diagnosis was about 1:6 to 1:7 for conventional CT images and about 1:4 to 1:5 for HRCT images as determined by MOS. The PSNR corresponding to acceptable compression ratios was about 50 dB. The difference in density distribution between HRCT and conventional CT was statistically significant (Friedman test: p<0.02) in histogram analysis. Results suggested that, in comparison with conventional CT, a high compression ratio was not suitable for HRCT.
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Affiliation(s)
- S Yamamoto
- Department of Radiology, Osaka University Hospital, Suita, Japan
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33
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Matsuno N, Ikeda T, Ikeda K, Hama K, Iwamoto H, Uchiyama M, Kozaki K, Narumi Y, Kikuchi K, Degawa H, Nagao T. Changes of cytokines in direct endotoxin adsorption treatment on postoperative multiple organ failure. Ther Apher 2001; 5:36-9. [PMID: 11258608 DOI: 10.1046/j.1526-0968.2001.005001036.x] [Citation(s) in RCA: 18] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Multiple organ failure (MOF) is a serious condition that involves simultaneous or consecutive functional failure of several important organs. Furthermore, sepsis is known to play an important role in the occurrence of MOF. Hemoadsorption therapy with the endotoxin adsorption column containing polymyxin B immobilized fibers by direct hemoperfusion (PMX-DHP) is reportedly effective in the treatment of septic shock. This study examined the changes induced on cytokines upon PMX-DHP treatment in 25 patients who underwent emergency abdominal surgery and were immediately started on a postoperative regimen of continuous hemodiafiltration (CHDF) and PMX-DHP. Postoperative MOF was observed in these patients with a mean APACHE II SCORE of 25.5. Eighty percent of patients survived for more than 1 month. We were able to reduce the necessary dose of dopamine in 85.7% of patients because hemodynamic stability improved after administration of PMX-DHP. Interleukin 6 blood levels did not change significantly before or after PMX-DHP treatment in either the surviving or nonsurviving patients. Blood interleukin 1 receptor antagonist levels decreased in both groups. Intercellular adhesion molecular-1, NOx, and thrombomodulin did not change significantly during the course of treatment in either group. Decreased blood levels of PAI-1 levels were found in the surviving patients whereas increased levels of PAI-1 were found in the non-surviving patients. In conclusion, PMX-DHP treatment may be limited clinically in its ability to remove inflammatory cytokines and humoral mediators. However, PMX-DHP treatment is useful for hemodynamic stabilization, which prevents development of MOF.
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Affiliation(s)
- N Matsuno
- Fifth Department of Surgery, Hachioji Medical Center, Tokyo Medical University, Hachioji-City, Japan
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34
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Uchiyama M, Matsuno N, Hama K, Iwamoto H, Narumi Y, Kikuchi K, Degawa H, Kozaki K, Kubota K, Takeuchi H, Sakurai E, Asuwa N, Masuda Toshihiko Hirano S, Nagao T. Comparison between nonpulsatile and pulsatile machine perfusion preservation in liver transplantation from non-heart-beating donors. Transplant Proc 2001; 33:936-8. [PMID: 11267136 DOI: 10.1016/s0041-1345(00)02276-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- M Uchiyama
- Department of Fifth Surgery, Pathology, Hachioji Medical Center of Tokyo Medical University, Tokyo, Japan
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35
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Narumi Y, Hagiwara M, Kohno M, Kindo K. Evidence for the singlet-dimer ground state in an S = 1 antiferromagnetic bond alternating chain. Phys Rev Lett 2001; 86:324-327. [PMID: 11177822 DOI: 10.1103/physrevlett.86.324] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2000] [Indexed: 05/23/2023]
Abstract
Susceptibility, ESR, and magnetization measurements have been performed on single crystals of an S = 1 bond alternating chain compound: [Ni(333-tet) (mu-NO2)] (ClO4) (333-tet = N,N'-bis(3-aminopropyl)propane-1,3-diamine) and the compound doped with a small amount of Zn. We observed an anomalous angular dependence in the Zn-doped sample. These results are well explained by the model based on the valence-bond solid picture for the singlet-dimer phase. The picture implies that the free spins of S = 1 with a positive uniaxial single-ion anisotropy are induced at the edges of the chains without forming the singlet dimer.
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Affiliation(s)
- Y Narumi
- CREST Japan and Technology Corporation, Kawaguchi, Saitama, Japan
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36
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Iwamoto H, Matsuno N, Narumi Y, Uchiyama M, Kozaki K, Degawa H, Hama K, Kikuchi K, Takeuchi H, Kozaki M, Nagao T. Beneficial effect of machine perfusion preservation on liver transplantation from non-heart-beating donors. Transplant Proc 2000; 32:1645-6. [PMID: 11119873 DOI: 10.1016/s0041-1345(00)01437-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- H Iwamoto
- Fifth Department of Surgery, Hachioji Medical Center, Tokyo Medical University, Tokyo, Japan
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37
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Degawa H, Matsuno N, Iwamoto H, Hama K, Nakamura Y, Narumi Y, Kikuchi K, Uchiyama M, Kozaki K, Nagao T. Primary nonfunctioning grafts in cadaveric kidney transplantation. Transplant Proc 2000; 32:1903-4. [PMID: 11119993 DOI: 10.1016/s0041-1345(00)01485-8] [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: 11/23/2022]
Affiliation(s)
- H Degawa
- 5th Surgical Department, Hachioji Medical Center, Tokyo Medical University, Tokyo, Japan
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38
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Kikuchi K, Narumi Y, Hama K, Iwamoto H, Uchiyama M, Kozaki K, Degawa H, Matsuno N, Kozaki M, Nagao T. Kidney transplantation from spousal donors. Transplant Proc 2000; 32:1817-8. [PMID: 11119951 DOI: 10.1016/s0041-1345(00)01359-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- K Kikuchi
- 5th Department of Surgery, Hachioji Medical Center, Tokyo Medical University, Tokyo, Japan
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39
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Tsuda K, Narumi Y, Nakamura H, Nonomura I, Okuyama A. [Staging urinary bladder cancer with dynamic MR imaging]. Hinyokika Kiyo 2000; 46:835-9. [PMID: 11193308] [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: 02/19/2023]
Abstract
This article reviews the magnetic resonance (MR) staging of bladder cancer. The multiplanar and soft-tissue characterization capabilities of MR imaging make it a valuable diagnostic tool to image the urinary bladder. Recent advances of MR imaging such as fast imaging, pelvic phased array coil, and dynamic imaging improve the image quality and diagnostic accuracy for staging bladder cancer. Some patient-related factors are also important for optimal imaging of the urinary bladder, especially motion artifacts from the gastrointestinal tract and the degree of bladder distension. An anticholinergic agent should be used for suppressing the motion artifacts. Optimal bladder filling can be achieved by asking patients to void and drink water 1 hour before examinations. Scanning perpendicular to the bladder wall is necessary for optimal evaluation for staging bladder cancer. Oblique scanning is needed in cases when a tumor is not located on the dome, base, anterior wall, posterior wall, or lateral walls. The early phase image of dynamic imaging is most useful for staging tumors. Better contrast between tumor and bladder wall on dynamic images provides high staging accuracy, especially in differentiation between superficial tumors and tumors with muscle invasion. MR imaging is comparable to computed tomography (CT) in the evaluation of lymph nodes. Although MR imaging currently is not appropriate for screening for bladder cancer and detecting small tumors, it has been proved to be most useful in the staging of bladder cancer.
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Affiliation(s)
- K Tsuda
- Department of Radiology, Sakai Municipal Hospital
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40
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Takahashi S, Kim T, Murakami T, Okada A, Hori M, Narumi Y, Nakamura H. Influence of paramagnetic contrast on single-shot MRCP image quality. Abdom Imaging 2000; 25:511-3. [PMID: 10931987 DOI: 10.1007/s002610000083] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
To assess the ability of gadolinium enhancement to suppress the overlapping vessel signals that diminish the image quality of magnetic resonance cholangiopancreatography (MRCP), we obtained MRCP before and after intravenous injection of gadolinium. Signal intensity ratio of the common bile duct to the main pancreatic duct was significantly improved after the injection of contrast media. The image quality of the postcontrast MRCP was better than that of the precontrast one.
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Affiliation(s)
- S Takahashi
- Department of Radiology, Osaka University Medical School 2-2, Yamdaoka, Suita, Osaka, 5650871, Japan
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41
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Kojima Y, Nonomura N, Nose T, Inoue T, Tsuda K, Narumi Y, Nakamura H, Shin M, Yasunaga Y, Aozasa K, Miki T, Okuyama A. Transition zone biopsy in the detection of prostate cancer. Eur Urol 2000; 37:675-9. [PMID: 10828667 DOI: 10.1159/000020217] [Citation(s) in RCA: 20] [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: 11/19/2022]
Abstract
OBJECTIVE About 25% of all prostate cancers occur in the transition zone (TZ). We analyzed the impact of 4 systematic TZ and 2 systematic apex (AP) biopsies in addition to systematic sextant biopsies in an effort to establish the diagnostic importance of early prostate cancer. METHODS One hundred and thirty patients underwent systematic transperineal multipoint prostate biopsy (biopsy of 12 sites, including 4 TZ and 2 AP biopsies). RESULTS Forty-one of 130 men (31.5%) had biopsy specimens positive for cancer, and cancer originated in the TZ alone in 4 of these 41 patients (9.8%). Fourteen patients underwent radical retropubic prostatectomy. We compare the pathological findings of radical prostatectomy specimens and biopsy results. Prostate cancers predicted to be stage T(2c) by TZ biopsy were all classified as pT(2c) or greater. CONCLUSIONS Routine TZ biopsy does not substantially increase the prostate cancer detection rate; however, it can be useful in patients who require repeat biopsy.
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Affiliation(s)
- Y Kojima
- Department of Urology, Osaka University Medical School, Suita, Japan.
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42
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Murakami T, Kim T, Hori M, Takamura M, Tsuda K, Takahashi S, Narumi Y, Nakamura H. Multishot echo-planar imaging with gadopentetate dimeglumine. Preliminary study of efficacy for detection of hypovascular metastatic liver tumors. Acta Radiol 2000; 41:263-8. [PMID: 10866082 DOI: 10.1034/j.1600-0455.2000.041003263.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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To evaluate the usefulness of sequential T2-weighted spin-echo type multishot echo-planar (T2-EP) imaging with gadopentetate dimeglumine for the detection of hypovascular metastatic liver tumors. MATERIAL AND METHODS Fifteen consecutive patients with 56 proven hypovascular metastatic liver tumors were included in the study. Three observers blindly and independently read the whole-liver images obtained with T2-weighted spin-echo, T2-weighted single-shot fast spin-echo, T1-weighted fast multiplanar spoiled GRASS and T2-EP images obtained before and 25, 60, 90 and 120 s after injection of 0.2 mmol/kg b.w. of gadopentetate dimeglumine. The diagnostic accuracy was estimated by calculating the area under the observer-specific binomial receiver operating characteristics curves (Az). RESULTS T2-EP images obtained 60 s after contrast injection showed significantly higher contrast-to-noise (C/N) ratios than the other imaging techniques. A combination of all phases of the T2-EP images produced the highest sensitivity and specificity. In terms of the Az value, the diagnostic accuracy for tumor detection achieved with a combination of all phases of the T2-EP images was significantly higher than that with T1-SPGR and T2-SSFSE images (p<0.01). The Az values of the T2-EP images (Az=0.975) were higher than those of T2-CSE images (Az=0.948), but the difference was not significant. CONCLUSION Our preliminary study revealed that sequential imaging with enhanced T2-EP images was useful for the detection of hypovascular metastatic liver tumors because of its superior C/N ratio and sensitivity.
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Affiliation(s)
- T Murakami
- Department of Radiology, Osaka University Medical School, Suita-city, Japan
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43
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Nakamura H, Murata M, Murakami T, Oi H, Narumi Y. Diagnostic imaging of hepatocellular carcinoma in interventional radiology. Gan To Kagaku Ryoho 2000; 27 Suppl 2:332-5. [PMID: 10895176] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
- H Nakamura
- Department of Radiology, Osaka University School of Medicine
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44
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Kozaki K, Sakurai E, Kubota K, Iwamoto H, Hama K, Narumi Y, Uchiyama M, Kikuchi K, Degawa H, Matsuno N, Kozaki M, Nagao T. Prediction of kidney nonfunction after transplantation with machine perfusion preservation. Transplant Proc 2000; 32:275-6. [PMID: 10715415 DOI: 10.1016/s0041-1345(99)00955-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- K Kozaki
- Fifth Department of Surgery, Hachioji Medical Center, Tokyo, Japan
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45
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Matsuno N, Kozaki K, Degawa H, Narumi Y, Suzuki N, Kikuchi K, Uchiyama M, Kubota K, Sakurai E, Kozaki M, Nagao T. A useful predictor in machine perfusion preservation for kidney transplantation from non-heart-beating donors. Transplant Proc 2000; 32:173-4. [PMID: 10701011 DOI: 10.1016/s0041-1345(99)00919-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- N Matsuno
- Fifth Department of Surgery, Hachioji Medical Center of Tokyo Medical University, Japan
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46
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Takamura M, Murakami T, Kurachi H, Kim T, Enomoto T, Narumi Y, Nakamura H. MR imaging of mesenteric hemangioma: a case report. Radiat Med 2000; 18:67-9. [PMID: 10852659] [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: 02/16/2023]
Abstract
A 62-year-old woman presented with a mobile abdominal palpable mass. She underwent MR examination twice. Because of the mobility of the mass, it was out of the field of view on the first MR examination. The second MR examination detected the mass, which showed heterogeneous signal intensity including low and high intensity on T2-weighted spin echo images. The mass, which was cavernous hemangioma with old hemorrhage, was difficult to differentiate from fibroma or thecoma of the ovary or subserosal leiomyoma of the uterus.
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Affiliation(s)
- M Takamura
- Department of Radiology, Osaka University Medical School, Suita, Japan
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47
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Kadowaki K, Murakami T, Yoshioka H, Kim T, Takahashi S, Tomoda K, Narumi Y, Nakamura H. Helical CT imaging of gastric cancer: normal wall appearance and the potential for staging. Radiat Med 2000; 18:47-54. [PMID: 10852655] [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: 02/16/2023]
Abstract
PURPOSE To evaluate the CT appearance of the normal gastric wall and the effectiveness of contrast enhanced helical CT for T-staging of gastric cancer. METHODS For the basic experiment, two resected stomachs with gastric cancer were filled with water and examined by helical CT imaging. For the clinical study, 59 consecutive patients with gastric cancer who had received preoperative helical CT examination and had also been operated on were entered in this study. Helical CT images were evaluated independently by three radiologists without knowledge of histological staging results. RESULTS The basic examination of a histopathological correlation with CT images revealed that the inner layer with high attenuation corresponded to the mucosa and the muscular layer of the mucosa, the middle layer with low attenuation to the submucosal layer consisting of coarse tissues and containing fatty tissues, and the outer layer with slightly high attenuation to the proper muscle with serosa. The clinical study revealed that the rate of correct diagnosis through consensus reading was 66.1%. CONCLUSION The entire stomach with a well-stained mucosa can be visualized by contrast enhanced helical CT. However, T-staging of gastric cancer by helical CT did not appear to improve the accuracy of staging.
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Affiliation(s)
- K Kadowaki
- Department of Radiology, Yao Municipal Hospital, Osaka, Japan
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48
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Abstract
We investigated the accelographic train-of-four response evaluated at the great toe at varying stimulating currents. Fifteen adult patients undergoing elective general anaesthesia were studied. The mean current at which a supramaximal T1 value could be elicited was > 49 (9) mA [mean (SD)]. Ratios of accelographic T1 values at 50, 40, 30, 20 and 10 mA to accelographic T1 value at 60 mA were 0.90 (0. 18), 0.58 (0.37), 0.38 (0.37), 0.19 (0.26) and 0.00 (0.00), respectively [mean (SD), p < 0.05 for 50 mA vs. 30, 20 and 10 mA, p < 0.05 for 40 mA vs. 20 and 10 mA, and p < 0.05 for 30 vs. 10 mA]. Threshold currents for train-of-four (the lowest currents at which any train-of-four response could be elicited) before and after induction of anaesthesia were 30 (10) and 31 (10) mA, respectively. The train-of-four ratio (T4/T1) measured at varying currents did not differ significantly. However, in the patients in whom threshold currents for train-of-four were 40, 30 and 20 mA, the train-of-four ratio recorded at the threshold current was significantly less than at 50 mA. We conclude that at the great toe, the mean current at which a supramaximal response to train-of-four can be yielded is as high as > 49 mA. The mean threshold currents for TOF before and after induction of anaesthesia were 30 and 31 mA, respectively. Train-of-four ratio measured at the threshold current is less than that at 50 mA.
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Affiliation(s)
- Y Saitoh
- Department of Anesthesiology, Toride Kyodo General Hospital, 2-1-1, Hongo, Toride City, Ibaraki, 302-0022, Japan
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49
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Kim T, Murakami T, Takahashi S, Tsuda K, Tomoda K, Narumi Y, Oi H, Sakon M, Nakamura H. Optimal phases of dynamic CT for detecting hepatocellular carcinoma: evaluation of unenhanced and triple-phase images. Abdom Imaging 1999; 24:473-80. [PMID: 10475931 DOI: 10.1007/s002619900543] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND To determine the optimal phases of dynamic computed tomography (CT) for detecting hepatocellular carcinoma (HCC). METHODS Fifty-two patients with 85 HCC nodules were examined by means of unenhanced and triple-phase CT images of the whole liver. The time for obtaining the arterial-phase images was 25-55 s after intravenous bolus injection of contrast material, the time for obtaining the portal venous-phase images was 65-100 s, and the time for obtaining late-phase images was 145 s to 4 min. Detectability of the HCC nodules for all phases was statistically compared. RESULTS The detection rates for the arterial- and late-phase images were significantly higher than for the unenhanced and portal venous-phase images (p < 0.01). The combination of arterial- and late-phase images showed the same number of HCC nodules in the same number of patients as did the combination of unenhanced and triple-phase images. CONCLUSION The combination of the arterial- and late-phase imagings was best for detecting HCC nodules.
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Affiliation(s)
- T Kim
- Department of Radiology, Osaka University Medical School, 2-2 Yamadaoka, Suita City, Osaka 565-0871, Japan
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50
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Saitoh Y, Narumi Y, Fujii Y. Post-tetanic count and train-of-four responses during neuromuscular block produced by vecuronium and infusion of nicardipine. Br J Anaesth 1999; 83:340-2. [PMID: 10618956 DOI: 10.1093/bja/83.2.340] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have examined onset and recovery of neuromuscular block produced by vecuronium using either post-tetanic count (PTC), or the first twitch of the train-of-four (TOF) (T1/T0) and TOF ratio (T4/T1) during continuous infusion of nicardipine. Sixty adult patients were allocated to one of four groups of 15 patients each: nicardipine-PTC, nicardipine-TOF, control-PTC and control-TOF. In the nicardipine-PTC and nicardipine-TOF groups, nicardipine 0.03 mg kg-1 was given before vecuronium 0.1 mg kg-1 and a continuous infusion of nicardipine was started immediately at a rate of 2 micrograms kg-1 min-1. Mean time from administration of vecuronium to onset of neuromuscular block in the nicardipine-PTC and nicardipine-TOF groups was significantly shorter than in the control-PTC and control-TOF groups (166 (SD 39) vs 220 (28) s; P < 0.05). There was no significant difference in recovery of PTC between the nicardipine-PTC and control-PTC groups or in recovery of TOF ratio in the nicardipine-TOF and control-TOF groups. However, during recovery, T1/T0 in the nicardipine-TOF group was significantly less than that in the control-TOF group, 60-100 min after administration of vecuronium.
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Affiliation(s)
- Y Saitoh
- Department of Anaesthesiology, Toride Kyodo General Hospital, Ibaraki, Japan
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