51
|
Takayama K, Myouchin K, Wada T, Kotsugi M, Kurokawa S, Kichikawa K. P-002 Incidence and Prognosis of Plaque Protrusion during Carotid Artery Stenting. J Neurointerv Surg 2016. [DOI: 10.1136/neurintsurg-2016-012589.44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
52
|
Yamashita M, Takahashi R, Kokubo M, Takayama K, Tanabe H, Sueoka M, Ishii M, Okuuchi N, Iwamoto Y, Tachibana H. SU-F-T-268: A Feasibility Study of Independent Dose Verification for Vero4DRT. Med Phys 2016. [DOI: 10.1118/1.4956408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
53
|
Shibata H, Kato S, Sekine I, Abe K, Araki N, Iguchi H, Izumi T, Inaba Y, Osaka I, Kato S, Kawai A, Kinuya S, Kodaira M, Kobayashi E, Kobayashi T, Sato J, Shinohara N, Takahashi S, Takamatsu Y, Takayama K, Takayama K, Tateishi U, Nagakura H, Hosaka M, Morioka H, Moriya T, Yuasa T, Yurikusa T, Yomiya K, Yoshida M. Diagnosis and treatment of bone metastasis: comprehensive guideline of the Japanese Society of Medical Oncology, Japanese Orthopedic Association, Japanese Urological Association, and Japanese Society for Radiation Oncology. ESMO Open 2016; 1:e000037. [PMID: 27843593 PMCID: PMC5070259 DOI: 10.1136/esmoopen-2016-000037] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 02/02/2016] [Indexed: 01/14/2023] Open
Abstract
Diagnosis and treatment of bone metastasis requires various types of measures, specialists and caregivers. To provide better diagnosis and treatment, a multidisciplinary team approach is required. The members of this multidisciplinary team include doctors of primary cancers, radiologists, pathologists, orthopaedists, radiotherapists, clinical oncologists, palliative caregivers, rehabilitation doctors, dentists, nurses, pharmacists, physical therapists, occupational therapists, medical social workers, etc. Medical evidence was extracted from published articles describing meta-analyses or randomised controlled trials concerning patients with bone metastases mainly from 2003 to 2013, and a guideline was developed according to the Medical Information Network Distribution Service Handbook for Clinical Practice Guideline Development 2014. Multidisciplinary team meetings are helpful in diagnosis and treatment. Clinical benefits such as physical or psychological palliation obtained using the multidisciplinary team approaches are apparent. We established a guideline describing each specialty field, to improve understanding of the different fields among the specialists, who can further provide appropriate treatment, and to improve patients’ outcomes.
Collapse
|
54
|
Uno K, Nishizawa D, Seo S, Takayama K, Matsumura S, Sakai N, Ohi K, Nabeshima T, Hashimoto R, Ozaki N, Hasegawa J, Sato N, Tanioka F, Sugimura H, Fukuda KI, Higuchi S, Ujike H, Inada T, Iwata N, Sora I, Iyo M, Kondo N, Won MJ, Naruse N, Uehara-Aoyama K, Itokawa M, Yamada M, Ikeda K, Miyamoto Y, Nitta A. The Piccolo Intronic Single Nucleotide Polymorphism rs13438494 Regulates Dopamine and Serotonin Uptake and Shows Associations with Dependence-Like Behavior in Genomic Association Study. Curr Mol Med 2016; 15:265-74. [PMID: 25817861 DOI: 10.2174/1566524015666150330145722] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 02/27/2015] [Accepted: 03/24/2015] [Indexed: 11/22/2022]
Abstract
Piccolo (PCLO) inhibits methamphetamine-induced neuropharmacological effects via modulation of dopamine (DA) uptake and regulation of the transport of synaptic vesicles in neuronal cells. Clinical studies have recently suggested that the single nucleotide polymorphism (SNP) rs13438494 in the intron 24 of the PCLO gene is associated with psychiatric disorder, in the meta-analysis of GWAS. Therefore, in this study, we attempted to evaluate the possible role of the PCLO SNP in the mechanisms of uptake of monoamines. To characterize rs13438494 in the PCLO gene, we constructed plasmids carrying either the C or A allele of the SNP and transiently transfected them into SH-SY5Y cells to analyze genetic effects on the splicing of PCLO mRNA. The C and A allele constructs produced different composition of the transcripts, indicating that the intronic SNP does affect the splicing pattern. We also transfected DA and serotonin (5-hydroxytryptamine; 5- HT) transporters into cells and analyzed their uptakes to elucidate the association to psychiatric disorders. In the cells transfected with the C allele, both the DA and 5-HT uptake were enhanced compared to the A allele. We also conducted a clinical study, in order to clarify the genetic associations. PCLO rs13438494 exhibits a relationship with the symptoms of drug dependence or related parameters, such as the age of first exposure to methamphetamine, eating disorders, tobacco dependence and fentanyl requirement. Our findings suggest that rs13438494 is associated with drug abuse and contributes to the pathogenesis of psychiatric disorders via modulation of neurotransmitter turnover.
Collapse
|
55
|
Mizowaki T, Norihisa Y, Takayama K, Ikeda I, Inokuchi H, Nakamura K, Kamba T, Inoue T, Kamoto T, Ogawa O, Hiraoka M. Ten-year outcomes of intensity-modulated radiation therapy combined with neoadjuvant hormonal therapy for intermediate- and high-risk patients with T1c-T2N0M0 prostate cancer. Int J Clin Oncol 2016; 21:783-790. [PMID: 26843024 DOI: 10.1007/s10147-016-0954-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 01/13/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND We aimed to analyze the 10-year outcomes of intensity-modulated radiation therapy (IMRT) combined with neoadjuvant hormonal therapy (HT) for patients with intermediate- and high-risk T1c-T2N0M0 prostate cancer. METHODS Fifty patients with T1c-T2N0M0 prostate cancer, who were treated with high-dose IMRT combined with neoadjuvant HT, were evaluated. Of these patients, 19 and 31 were classified into the intermediate- and high-risk groups, respectively. Neoadjuvant HT was administered over a median duration of 6 months; 74 and 78 Gy in 2 Gy per fraction were essentially delivered to the intermediate- and high-risk cases, respectively. Adjuvant HT was not administered to any of the patients after the completion of IMRT. RESULTS Over a median follow-up period of 118 months, the 10-year prostate-specific antigen failure-free survival, prostate-specific antigen failure-free, salvage hormonal therapy-free, prostate cancer-specific survival, and overall survival rates were 70.2 %, 78.7 %, 89.2 %, 100 %, and 88.8 %, respectively. No grade 3 or higher acute or late toxicities were observed. The 10-year likelihoods of developing grade 2 late urinary and rectal toxicities were 13.7 % and 4.2 %, respectively. Compared with the outcomes of a cohort of historical controls who were locally irradiated with 70 Gy by three-dimensional conformal radiotherapy, the prostate-specific antigen failure-free rate was significantly better in the IMRT groups (78.7 % vs. 53.4 % at 10 years; p = 0.027). CONCLUSIONS High-dose IMRT combined with neoadjuvant HT achieved not only high prostate-specific antigen control, but also excellent survival outcomes with acceptable morbidities, for a Japanese cohort of intermediate- and high-risk T1c-T2N0M0 prostate cancer patients, and these results warrant further investigation.
Collapse
|
56
|
Okada T, Takayama K, Kokubo M, Kono Y, Matsumoto K, Sumiyoshi T, Masuda N, Shiraishi Y, Negoro H, Utsunomiya N, Tsunemori H, Okubo K, Segawa T, Moroi S, Muguruma K, Kawakita M. [CLINICAL OUTCOMES OF EXTERNAL-BEAM RADIOTHERAPY COMBINED WITH NEOADJUVANT ANDROGEN DEPRIVATION THERAPY FOR HIGH-RISK PROSTATE CANCER]. Nihon Hinyokika Gakkai Zasshi 2016; 107:162-169. [PMID: 28740047 DOI: 10.5980/jpnjurol.107.162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
(Purpose) We investigated the outcome of external-beam radiotherapy (EBRT) with neoadjuvant androgen deprivation therapy (NeoADT) for high-risk prostate cancer defined by National Comprehensive Cancer Network (NCCN) guideline. (Patients and method) From 2002 to 2013, 70 patients with high-risk prostate cancer (PSA ≥20 ng/ml or clinical T stage ≥T3a, Gleason score ≥8) were treated with NeoADT and EBRT. EBRT consisted of three-dimensional conformal or intensity modulated radiotherapy with or without whole-pelvic radiation. Biochemical failure was defined according to the Phoenix definition. Biochemical progression-free survival (bPFS) and overall survival (OS) were calculated by Kaplan-Meier method, and prognostic factors for bPFS were analyzed by using the Cox proportional hazard model. (Result) The median age and initial prostate-specific antigen (PSA) level were 72 years old and 25.2 ng/ml, respectively. 43 patients had PSA level ≥20 ng/ml, 51 patients had clinical stage ≥T3a, 27 patients had Gleason score ≥8. The number of risk factors patients possessed was 1 (RiskN-1) in 31 patients, 2 (RiskN-2) in 27 patients and 3 (RiskN-3) in 12 patients. Median EBRT dose and duration of Neo ADT were 74 Gy and13.0 months, respectively. Whole-pelvic radiation was administered in 7 patients. After median follow-up of 4.8 years, biochemical and clinical failure occurred in 23 and 2 patients, respectively. No patients died of cancer. Five-year/8-year bPFS and OS were 63%/54% and 100%/91%, respectively. In multivariate analysis, three high-risk factor of NCCN guideline (PSA, clinical stage, Gleason score) did not predict outcome after EBRT independently, but RiskN (-1 vs -2, 3, HR 35.35, 95%CI 2.51-498.05, p<0.01) and pre-EBRT PSA (continuous, hazard ratio 1.31, 95%CI 1.01-1.71, p<0.05) were the significant predictors of bPFS. Five-year/8-year bPFS in RiskN-1 group and RiskN-2 or -3 group were 89%/79% and 47%/39%, respectively. Grade 3/4 adverse events (CTCAE ver4.0-JCOG) occurred in 2 patients. (Conclusion) Median dose of 74 Gy EBRT with intermediate-term NeoADT was safe and beneficial for high-risk prostate cancer. The number of risk factors and pre-EBRT PSA level were the independent prognostic factors for biochemical progression-free survival.
Collapse
|
57
|
Arima Y, Namiki T, Ueno M, Kato K, Tokoro S, Takayama K, Miura K, Yokozeki H. Histiocytoid Sweet syndrome: a novel association with relapsing polychondritis. Br J Dermatol 2015; 174:691-4. [DOI: 10.1111/bjd.14229] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
58
|
Hata A, Okuda C, Kaji R, Masago K, Fujita S, Katakami N, Takayama K, Miura K. 441P Bevacizumab (BEV) combination chemotherapies (CCTs) for patients (Pts) with high-risk factors of pulmonary hemorrhage (PH) in advanced non-small cell lung cancer (NSCLC). Ann Oncol 2015. [DOI: 10.1093/annonc/mdv532.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
59
|
Onuki Y, Kida C, Funatani C, Hayashi Y, Takayama K. MRI as a promising tool for evaluation of the stability of cosmetic emulsions. Int J Cosmet Sci 2015; 38:272-8. [DOI: 10.1111/ics.12290] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 10/17/2015] [Indexed: 11/29/2022]
|
60
|
Shioyama Y, Nagata Y, Komiyama T, Takayama K, Shibamoto Y, Ueki N, Yamada K, Kozuka T, Kimura T, Matsuo Y. Multi-institutional Retrospective Study of Stereotactic Body Radiation Therapy for Stage I Small Cell Lung Cancer: Japan Radiation Oncology Study Group (JROSG). Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.243] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
61
|
Kimura T, Nagata Y, Harada H, Hayashi S, Matsuo Y, Ueki N, Takanaka T, Kokubo M, Takayama K, Onishi H, Hirakawa K, Shioyama Y, Ehara T. A Phase I Study of Stereotactic Body Radiation Therapy for Centrally Located Stage IA Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
62
|
Takayama K, Mitsuhashi S, Nonaka I, Noguchi S, Nishino I. Gene mutation screening using whole exome sequencing in lipid storage myopathy. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
63
|
Iizuka Y, Matsuo Y, Ishihara Y, Akimoto M, Tanabe H, Takayama K, Ueki N, Yokota K, Mizowaki T, Kokubo M, Hiraoka M. Dynamic tumor-tracking radiotherapy with real-time monitoring for liver tumors using a gimbal mounted linac. Radiother Oncol 2015; 117:496-500. [PMID: 26362722 DOI: 10.1016/j.radonc.2015.08.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 08/24/2015] [Accepted: 08/30/2015] [Indexed: 12/21/2022]
Abstract
PURPOSE Dynamic tumor-tracking stereotactic body radiotherapy (DTT-SBRT) for liver tumors with real-time monitoring was carried out using a gimbal-mounted linear accelerator and the efficacy of the system was determined. In addition, four-dimensional (4D) dose distribution, tumor-tracking accuracy, and tumor-marker positional variations were evaluated. MATERIALS AND METHODS A fiducial marker was implanted near the tumor prior to treatment planning. The prescription dose at the isocenter was 48-60 Gy, delivered in four or eight fractions. The 4D dose distributions were calculated with a Monte Carlo method and compared to the static SBRT plan. The intrafractional errors between the predicted target positions and the actual target positions were calculated. RESULTS Eleven lesions from ten patients were treated successfully. DTT-SBRT allowed an average 16% reduction in the mean liver dose compared to static SBRT, without altering the target dose. The average 95th percentiles of the intrafractional prediction errors were 1.1, 2.3, and 1.7 mm in the left-right, cranio-caudal, and anterior-posterior directions, respectively. After a median follow-up of 11 months, the local control rate was 90%. CONCLUSIONS Our early experience demonstrated the dose reductions in normal tissues and high accuracy in tumor tracking, with good local control using DTT-SBRT with real-time monitoring in the treatment of liver tumors.
Collapse
|
64
|
Ugajin T, Takahashi M, Miyagishi C, Takayama K, Yokozeki H. A case of bullous pemphigoid associated with infiltration and activation of basophils. Br J Dermatol 2015; 173:1095-8. [DOI: 10.1111/bjd.13875] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
65
|
Inokuchi H, Mizowaki T, Norihisa Y, Takayama K, Ikeda I, Nakamura K, Nakamura M, Hiraoka M. Clinical effect of multileaf collimator width on the incidence of late rectal bleeding after high-dose intensity-modulated radiotherapy for localized prostate carcinoma. Int J Clin Oncol 2015; 21:156-61. [PMID: 26164689 DOI: 10.1007/s10147-015-0873-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 06/28/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND Several studies have confirmed a dosimetric advantage associated with use of a smaller leaf in intensity-modulated radiation therapy (IMRT). However, no studies have identified any clinical benefits. We investigated the effect of a smaller multileaf collimator (MLC) width on the onset of late rectal bleeding after high-dose prostate IMRT. MATERIALS AND METHODS Two hundred and five prostate cancer patients were treated with a total dose of 78 Gy in 39 fractions by use of a dynamic MLC technique; however, two different MLC were used: a 10-mm-wide device and a 5-mm-wide device. Gastrointestinal toxicity and several clinical factors were assessed. RESULTS The 5-year actuarial risk of grade 2 or higher rectal bleeding was 6.9 % for the 10-mm-wide group (n = 132) and 1.8 % for the 5-mm-wide group (n = 73) (p = 0.04). The median estimated rectal doses for the two groups were 55.1 and 50.6 Gy (p < 0.001), respectively. Univariate analysis showed that acute toxicity, rectal V30-60, median rectal dose, normal tissue complication probability (NTCP), and MLC type were significant predictive factors for late rectal toxicity. In multivariate analysis, acute toxicity and NTCP remained significant. CONCLUSION In our planning approach for prostate IMRT, a decrease in MLC width from 10 to 5 mm contributed to further rectal dose reduction, which was the most important predictor of late rectal toxicity.
Collapse
|
66
|
Mizowaki T, Norihisa Y, Takayama K, Ikeda I, Inokuchi H, Nakamura K, Kamba T, Inoue T, Kamoto T, Ogawa O, Hiraoka M. Long-term outcomes of intensity-modulated radiation therapy combined with neoadjuvant androgen deprivation therapy under an early salvage policy for patients with T3-T4N0M0 prostate cancer. Int J Clin Oncol 2015; 21:148-55. [DOI: 10.1007/s10147-015-0867-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Accepted: 06/19/2015] [Indexed: 12/12/2022]
|
67
|
Takayama K, Wada T, Myouchin K, Nakagawa H, Taoka T, Nakagawa I, Kurokawa S, Kichikawa K. E-132 diagnostic accuracy of magnetic resonance angiography following coil embolization with the enterprise stent for cerebral aneurysm. J Neurointerv Surg 2015. [DOI: 10.1136/neurintsurg-2015-011917.206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
68
|
Takeshita J, Masago K, Kato R, Otsuka K, Okuda C, Hata A, Kaji R, Fujita S, Takayama K, Kokubo M, Katakami N. A new strategy for metachronous primary lung cancer: stereotactic body radiation therapy with concurrent chemotherapy. Anticancer Res 2015; 35:3103-3107. [PMID: 25964602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND/AIM Patients with malignant lung cancer often develop a solitary pulmonary nodule after treatment of the initial cancer. In those cases, it is difficult to distinguish primary lung cancer (PLC) from lung metastasis. Therefore, both local therapy for a single lung lesions and systemic therapy for micrometastases are needed. This retrospective study aimed to evaluate the safety and tolerability of concurrent stereotactic body radiation therapy (SBRT) and chemotherapy in patients with metachronous PLC. PATIENTS AND METHODS We reviewed the records of 10 patients with metachronous PLC treated with SBRT and concurrent chemotherapy with curative intent from 2007 to 2013. The delivered radiation dose was 48 Gy in four fractions. RESULTS All patients received SBRT with concurrent chemotherapy on schedule. Complete response rate was 90%. Safety profile of this treatment was compatible with that of traditional chemoradiotherapy. CONCLUSION Our study showed good feasibility and safety for SBRT with concurrent chemoradiotherapy.
Collapse
|
69
|
Nakahara T, Moroi Y, Takayama K, Nakanishi Y, Furue M. Analysis of sebum lipid composition and the development of acneiform rash before and after administration of egfr inhibitor. ACTA ACUST UNITED AC 2015; 22:e124-7. [PMID: 25908917 DOI: 10.3747/co.22.2283] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Treatment with an epidermal growth factor receptor inhibitor (egfri) in patients having non-small-cell lung cancer can cause frequent and diverse skin toxicities, an acneiform rash being one of the commonest. Although the exact pathophysiology of this rash and its development mechanisms remain unknown, investigators have noted that egfri-induced skin toxicity might be partly associated with sebaceous gland function. Sebum is composed mainly of the lipids squalene (sq), wax ester (we), triglyceride, free fatty acid, and cholesterol, which are secreted mostly from the sebaceous glands and by keratinocytes. We therefore investigated the lipid composition of sebum before and after administration of egfri and whether sebum composition was associated with the development of acneiform rash. To investigate any associated changes in sebum gland activity, we focused especially on alterations in the amounts of sq and we, which are secreted solely from the sebaceous glands. In contrast to our expectations, we observed no substantial changes in the lipid composition of sebum before and after administration of egfri. Composition varies with the individual; however, the proportion of sq and we derived from the sebaceous glands was significantly lower in regions that did not develop acneiform rash than in regions that did. Our results suggest that development of an acneiform rash after administration of egfri could be related to sebaceous gland activity. Measurement of the lipid composition of sebum before therapy with egfri might predict which patients will be prone to acneiform rash.
Collapse
|
70
|
Sone Y, Namiki T, Munetsugu T, Ueno M, Tokoro S, Nishizawa A, Takayama K, Yokozeki H. A case of subungual melanoma with bone invasion: destructive local invasion and multiple skin metastases. J Eur Acad Dermatol Venereol 2015; 30:1049-50. [PMID: 25764209 DOI: 10.1111/jdv.13102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
71
|
Fujikawa T, Takayama K. Spinal cord abscess and inflammatory bowel disease. QJM 2015; 108:253-4. [PMID: 25190264 DOI: 10.1093/qjmed/hcu181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
72
|
Matsumoto T, Hashimura M, Takayama K, Ishida K, Kawakami Y, Matsuzaki T, Nakano N, Matsushita T, Kuroda R, Kurosaka M. A radiographic analysis of alignment of the lower extremities--initiation and progression of varus-type knee osteoarthritis. Osteoarthritis Cartilage 2015; 23:217-23. [PMID: 25481289 DOI: 10.1016/j.joca.2014.11.015] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 11/05/2014] [Accepted: 11/14/2014] [Indexed: 02/02/2023]
Abstract
OBJECTIVE This study aimed to investigate alignment based on age in normal knees and alignment based on deformity in osteoarthritis (OA) knees using detailed radiographic parameters. DESIGN Various parameters were measured from weight-bearing long leg radiographs of 1251 legs (797 normal and 454 OA knees) as a cross-sectional study. Normal knees were classified by age (young, middle aged, aged, and elderly) and symptomatic OA knees on the basis of the alignment (femorotibial angle (FTA): mild, moderate, severe and profound). The mean measurements in each group were calculated and compared within each group. RESULTS The femoral shaft showed medially bowed curvature (femoral bowing) of approximately 2° in the young normal group, which shifted to lateral bowing with age. However, OA knees showed larger lateral bowing with OA grade, which might reduce the condylar-shaft angle and subsequently shifted the mechanical axis medially. Progression of mild to moderate OA might be associated with a decreasing condylar-shaft angle (femoral condylar orientation) and widening condylar-plateau angle (joint space narrowing) rather than decreasing tibial plateau flattering. Steeping of the tibial plateau inclination due to increasing tibial plateau shift (tibial plateau compression) rather than medial tibial bowing might be the main contributor to worsening of varus deformity in knees with severe and profound OA. CONCLUSIONS This cross-sectional study might provide the possibility of OA initiation and progression. The lateral curvature of the femoral shaft associated with aging may contribute to the initiation of varus-type OA of the knee. These changes in the femur may be followed by secondary signs of OA progression including varus femoral condylar orientation, medial joint space narrowing, and tibial plateau compression.
Collapse
|
73
|
Ishihara Y, Sawada A, Nakamura M, Miyabe Y, Tanabe H, Kaneko S, Takayama K, Mizowaki T, Kokubo M, Hiraoka M. Development of a dose verification system for Vero4DRT using Monte Carlo method. J Appl Clin Med Phys 2014; 15:4961. [PMID: 25493521 PMCID: PMC5711115 DOI: 10.1120/jacmp.v15i6.4961] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 07/08/2014] [Accepted: 07/01/2014] [Indexed: 11/23/2022] Open
Abstract
Vero4DRT is an innovative image-guided radiotherapy system employing a C-band X-ray head with gimbal mechanics. The purposes of this study were to propose specific MC models of the linac head and multileaf collimator (MLC) for the Vero4DRT and to verify their accuracy. For a 6 MV photon beam delivered by the Vero4DRT, a simulation code was implemented using EGSnrc. The linac head model and the MLC model were simulated based on its specification. Next, the percent depth dose (PDD) and beam profiles at depths of 15, 100, and 200 mm were simulated under source-to-surface distance of 900 and 1000 mm. Field size was set to 150 × 150 mm2 at a depth of 100 mm. Each of the simulated dosimetric metrics was then compared with the corresponding measurements by a 0.125 cc ionization chamber. After that, intra- and interleaf leakage, tongue-and-groove, and rounded-leaf profiles were simulated for the static MLC model. Meanwhile, film measurements were performed using EDR2 films under similar conditions to simulation. The measurement for the rounded-leaf profile was performed using the water phantom and the ionization chamber. The leaf physical density and abutting leaf gap were adjusted to obtain good agreement between the simulated intra- and interleaf leakage profiles and measurements. For the MLC model in step-and-shoot cases, a pyramid and a prostate IMRT field were simulated, while film measurements were performed using EDR2. For the linac head, exclusive of MLC, the difference in PDD was < 1.0% after the buildup region. The simulated beam profiles agreed to within 1.3% at each depth. The MLC model has been shown to reproduce dose measurements within 2.5% for static tests. The MLC is made of tungsten alloy with a purity of 95%. The leaf gap of 0.015 cm and the MLC physical density of 18.0 g/ cm3, which provided the best agreement between the simulated and measured leaf leakage, were assigned to our MC model. As a result, the simulated step-and-shoot IMRT dose distributions agreed with the film measurements to within 3.3%, with exception of the penumbra region. We have developed specific MC models of the linac head and the MLC in the Vero4DRT system. The results have demonstrated that our MC models have high accuracy.
Collapse
|
74
|
|
75
|
Takeshita J, Kato R, Hata A, Kaji R, Masago K, Fujita S, Shintani T, Takayama K, Kokubo M, Katakami N. Feasibility of Stereotactic Body Radiation Therapy with Concurrent Chemotherapy for Metachronous Primary Lung Cancer. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu436.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|