Radiation medicine最新文献_第2页

Multidetector computed tomography diagnosis of primary and secondary epiploic appendagitis 原发性和继发性网膜阑尾炎的多探测器计算机断层诊断

Radiation medicine Pub Date : 2008-12-01 DOI: 10.1007/s11604-008-0278-z

H. Osada, H. Ohno, W. Watanabe, K. Nakada, Takemichi Okada, Hisami Yanagita, K. Nishimura, M. Hondo, Takeo Takahashi, N. Honda

引用次数: 15

Intensity-modulated radiation therapy for orbital lymphoma 调强放射治疗眼眶淋巴瘤

Radiation medicine Pub Date : 2008-12-01 DOI: 10.1007/s11604-008-0276-1

S. Goyal, A. Cohler, Jayne Camporeale, V. Narra, N. Yue

引用次数: 30

Three-dimensional perfusion imaging of hepatocellular carcinoma using 256-slice multidetector-row computed tomography. 肝细胞癌三维灌注成像的256层多排计算机断层扫描。

Radiation medicine Pub Date : 2008-11-01 Epub Date: 2008-11-22 DOI: 10.1007/s11604-008-0266-3

Tatsushi Kobayashi, Takayuki Hayashi, Shintaro Funabasama, Shinsuke Tsukagoshi, Manabu Minami, Noriyuki Moriyama

{"title":"Three-dimensional perfusion imaging of hepatocellular carcinoma using 256-slice multidetector-row computed tomography.","authors":"Tatsushi Kobayashi, Takayuki Hayashi, Shintaro Funabasama, Shinsuke Tsukagoshi, Manabu Minami, Noriyuki Moriyama","doi":"10.1007/s11604-008-0266-3","DOIUrl":"https://doi.org/10.1007/s11604-008-0266-3","url":null,"abstract":"Purpose: The aim of this study was to evaluate the clinical capability of three-dimensional (3D) perfusion imaging of hepatocellular carcinoma (HCC) by performing dynamic scanning using a 256-slice multidetector-row CT (MDCT) scanner.Materials and methods: Two patients with HCC were examined in this study. They were scheduled to undergo transcatheter arterial infusion therapy using an arterial infusion reservoir system. The CT system used was a newly developed prototype scanner of 256-slice MDCT. Dynamic CT scanning was performed with intraarterial injection via the reservoir route, and perfusion analysis was done based on the 3D data.Results: The blood flow volume per unit volume in the tumors was significantly increased compared with that in normal hepatic parenchyma. Using a 3D workstation, 3D perfusion images could be displayed by fusing CT images with perfusion images about blood flow volume.Conclusion: Three-dimensional perfusion images, which enable 3D evaluation of perfusion in HCCs, can be generated using 256-slice MDCT.","PeriodicalId":49640,"journal":{"name":"Radiation medicine","volume":"26 9","pages":"557-61"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s11604-008-0266-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27858071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Multiple rice body formation accompanying the chronic nonspecific tenosynovitis of flexor tendons of the wrist. 伴随慢性非特异性腕屈肌腱腱鞘炎的多重稻体形成。

Radiation medicine Pub Date : 2008-11-01 Epub Date: 2008-11-22 DOI: 10.1007/s11604-008-0270-7

Tarkan Ergun, Hatice Lakadamyali, Ozgur Aydin

引用次数: 34

Imaging findings from a case of bilharziasis in a patient with gross hematuria of several years' duration. 1例伴有数年血尿的血吸虫病患者的影像学表现。

Radiation medicine Pub Date : 2008-11-01 Epub Date: 2008-11-22 DOI: 10.1007/s11604-008-0274-3

Mari Kohno, Ryohei Kuwatsuru, Kazufumi Suzuki, Noriko Nishii, Toshio Hayano, Norio Mitsuhashi, Kazunari Tanabe

{"title":"Imaging findings from a case of bilharziasis in a patient with gross hematuria of several years' duration.","authors":"Mari Kohno, Ryohei Kuwatsuru, Kazufumi Suzuki, Noriko Nishii, Toshio Hayano, Norio Mitsuhashi, Kazunari Tanabe","doi":"10.1007/s11604-008-0274-3","DOIUrl":"https://doi.org/10.1007/s11604-008-0274-3","url":null,"abstract":"A 31-year-old man came to the hospital complaining of gross hematuria. Pelvic computed tomography (CT) showed mild thickening of the anterior wall of the urinary bladder. After injection of contrast material, the inner part of the anterior wall of the urinary bladder was mildly enhanced. Magnetic resonance imaging (MRI) showed that the anterior wall of the urinary bladder had localized thickening. There was a discrete area of hyper-intensity in the lesion on T2-weighted images. Differentiation of the lesion from malignancy was difficult based on the CT and MRI findings. The urologists decided to perform transurethral resection of this lesion. The pathological findings showed inflammatory granulation tissues in the peculiar muscle plate and Schistosoma haematobium eggs. His travel history showed that he had traveled to about 30 nations and had been swimming in a lake in Africa several years ago. He began therapy with praziquantel. MRI has better contrast resolution than CT and so detects findings of inflammatory change better than CT. Although it is difficult to distinguish a tumor from the inflammatory change, MRI nevertheless plays an important role in the diagnosis of patients with continuous hematuria, especially those with a history of travel to Africa and/or the Middle East.","PeriodicalId":49640,"journal":{"name":"Radiation medicine","volume":"26 9","pages":"553-6"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s11604-008-0274-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27858070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Effects of barium concentration on the radiopacity and biomechanics of bone cement: experimental study. 钡浓度对骨水泥透光性和生物力学影响的实验研究。

Radiation medicine Pub Date : 2008-11-01 Epub Date: 2008-11-22 DOI: 10.1007/s11604-008-0269-0

Masashi Makita, Koichiro Yamakado, Atsuhiro Nakatsuka, Haruyuki Takaki, Tadashi Inaba, Fumiyoshi Oshima, Hidetaka Katayama, Kan Takeda

{"title":"Effects of barium concentration on the radiopacity and biomechanics of bone cement: experimental study.","authors":"Masashi Makita, Koichiro Yamakado, Atsuhiro Nakatsuka, Haruyuki Takaki, Tadashi Inaba, Fumiyoshi Oshima, Hidetaka Katayama, Kan Takeda","doi":"10.1007/s11604-008-0269-0","DOIUrl":"https://doi.org/10.1007/s11604-008-0269-0","url":null,"abstract":"Purpose: This study was undertaken to evaluate the changes in the radiopacity and mechanics of polymethylmethacrylate (PMMA) bone cement with the addition of barium.Materials and methods: Barium sulfate powder was added to a PMMA bone cement with an initial 10% barium concentration. The changes in radiopacity and strength were evaluated by testing cement blocks containing four barium concentrations (10%, 20%, 30%, 40%). Radiopacity was evaluated by measuring the computed tomography (CT) values of the bone cement, and strength was evaluated by compressive, three-point bending, and impact load tests.Results: CT values increased in proportion to the barium concentration. The compressive load test showed that cement with a 40% barium concentration was significantly more fragile than cement with lower barium concentrations. The three-point bending load test showed that the cement became more fragile in proportion to the barium concentration. The impact load test showed that cement with 30% and 40% barium concentrations was significantly more fragile than cement with 10% and 20% barium concentrations.Conclusion: Radiopacity is increased and strength is reduced by adding increasing concentrations of barium powder to bone cement. The results of the present study suggest that adding barium permits the radiopacity and strength of bone cement to be adjusted in clinical practice.","PeriodicalId":49640,"journal":{"name":"Radiation medicine","volume":"26 9","pages":"533-8"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s11604-008-0269-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27857559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Contrast medium-assisted stereotactic image-guided radiotherapy using kilovoltage cone-beam computed tomography. 造影剂辅助立体定向图像引导放射治疗使用千伏锥束计算机断层扫描。

Radiation medicine Pub Date : 2008-11-01 Epub Date: 2008-11-22 DOI: 10.1007/s11604-008-0275-2

Keiichi Nakagawa, Hideomi Yamashita, Hiroshi Igaki, Atsuro Terahara, Kenshiro Shiraishi, Kiyoshi Yoda

引用次数: 12

Computed tomography-guided re-radiofrequency ablation for unresectable lung tumor with local progression previously treated with the same procedure. 计算机断层扫描引导下的再射频消融术治疗先前用相同方法治疗的局部进展不可切除的肺肿瘤。

Radiation medicine Pub Date : 2008-11-01 Epub Date: 2008-11-22 DOI: 10.1007/s11604-008-0267-2

Tomohisa Okuma, Toshiyuki Matsuoka, Akira Yamamoto, Yoshimasa Oyama, Kenji Nakamura, Yuichi Inoue

{"title":"Computed tomography-guided re-radiofrequency ablation for unresectable lung tumor with local progression previously treated with the same procedure.","authors":"Tomohisa Okuma, Toshiyuki Matsuoka, Akira Yamamoto, Yoshimasa Oyama, Kenji Nakamura, Yuichi Inoue","doi":"10.1007/s11604-008-0267-2","DOIUrl":"https://doi.org/10.1007/s11604-008-0267-2","url":null,"abstract":"Purpose: The aim of this study was to evaluate the technical success, complications, and effectiveness of re-radiofrequency (re-RF) ablation for recurrent lung tumors previously treated with RF ablation.Materials and methods: Reenlargement at the site of ablation seen on follow-up computed tomography (CT) is defined as local progression. CT-guided re-RF ablation was performed during 11 treatment sessions (mean tumor size 2.6 cm diameter) in 10 patients. The treated lesions consisted of five recurrences of primary lung cancer and six metastatic lung tumors from the esophagus (n = 2), bladder (n = 2), kidney (n = 1), and colon (n = 1).Results: At 3 of the 11 treatment sessions there were no relapses; at 8 of the 11 sessions local progression was seen at a median of 7 months (range 3-17 months). The local progression rate was significantly higher for tumors > 2.5 cm (P < 0.05). Minor complications included pneumothorax not requiring drainage (n = 3), subcutaneous emphysema (n = 1), and self-limited hemoptysis (n = 2).Conclusion: Re-RF ablation for lung tumors was feasible without any major complications. Although our study comprised only a few cases with a short follow-up period, patients with re-RF ablation were at higher risk of local progression.","PeriodicalId":49640,"journal":{"name":"Radiation medicine","volume":"26 9","pages":"519-25"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s11604-008-0267-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27857556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Comparison of tumor regression rate of uterine cervical squamous cell carcinoma during external beam and intracavitary radiotherapy. 宫颈鳞状细胞癌体外放射治疗与腔内放射治疗肿瘤消退率的比较。

Radiation medicine Pub Date : 2008-11-01 Epub Date: 2008-11-22 DOI: 10.1007/s11604-008-0268-1

Kiyoshi Ohara, Yumiko Oishi Tanaka, Akinori Oki, Yoshikazu Okamoto, Toyomi Satoh, Koji Matsumoto, Hiroyuki Yoshikawa

{"title":"Comparison of tumor regression rate of uterine cervical squamous cell carcinoma during external beam and intracavitary radiotherapy.","authors":"Kiyoshi Ohara, Yumiko Oishi Tanaka, Akinori Oki, Yoshikazu Okamoto, Toyomi Satoh, Koji Matsumoto, Hiroyuki Yoshikawa","doi":"10.1007/s11604-008-0268-1","DOIUrl":"https://doi.org/10.1007/s11604-008-0268-1","url":null,"abstract":"Purpose: We compared the radioresponse of cervical carcinoma that was closely related to local disease control by the tumor regression rate (RR) during intracavitary radiotherapy (ICRT) and external beam radiotherapy (EBRT) on the presumption that ICRT has a stronger treatment impact than EBRT because of its specific dose distribution.Materials and methods: A total of 37 patients were treated by EBRT at 45.0 Gy over 5 weeks, followed by high-dose-rate ICRT at 6.0 Gy per weekly insertion at point A three to five times and by boost EBRT. RR was defined as the slope (day(-1)) of the tumor-volume shrinkage curve fit to an exponential regression equation. Assuming that the tumors were ellipsoid, the tumor volume was estimated using magnetic resonance (MR) images obtained before treatment, after 45.0 Gy of EBRT, and after the third ICRT insertion. RRs were compared based on the radiotherapy method.Results: RR ranged between -0.008 to 0.093 day(-1) (median 0.021 day(-1)) during EBRT and -0.001 to 0.097 day(-1) (median 0.018 day(-1)) during ICRT, showing no significant difference or correlation between treatments.Conclusion: Contrary to expectations, RR did not directly relate to the impact of physical treatment. RR could be related to biological factors, such as the amount of tumor clearance and changes in tumor consistency during treatment.","PeriodicalId":49640,"journal":{"name":"Radiation medicine","volume":"26 9","pages":"526-32"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s11604-008-0268-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27857558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effect of a carbon fiber tabletop on the surface dose and attenuation for high-energy photon beams. 碳纤维桌面对高能光子光束表面剂量和衰减的影响。

Radiation medicine Pub Date : 2008-11-01 Epub Date: 2008-11-22 DOI: 10.1007/s11604-008-0271-6

Tülay P Meydanci, Gönül Kemikler

{"title":"Effect of a carbon fiber tabletop on the surface dose and attenuation for high-energy photon beams.","authors":"Tülay P Meydanci, Gönül Kemikler","doi":"10.1007/s11604-008-0271-6","DOIUrl":"https://doi.org/10.1007/s11604-008-0271-6","url":null,"abstract":"Purpose: The dose changes in the buildup region and beam attenuation by a carbon fiber tabletop were investigated for 6-and 18-MV photon beams.Materials and methods: Measurements were performed for 2 x 2 cm to 40 x 40 cm field sizes. The surface dose and percentage depth doses (PDD) were measured by a Markus parallel plate chamber. Attenuation measurements were made at the cylindrical phantom for 180 degrees rotation of the beam.Results: A carbon fiber tabletop increases the surface dose from 7.5% to 63.0% and from 4% to 43% for small fields at 6 and 18 MV, respectively. The increase was nearly fivefold for the 10 x 10 cm field and nearly twofold for the 40 x 40 cm field. Beam attenuation of the tabletop varies from 3.0% to 5.6% for 180 degrees and 120 degrees gantry angles for 6 MV.Conclusion: The carbon fiber tabletop significantly decreases the skin-sparing effect. The dosimetric effect of the tabletop may be higher, especially for the intensity-modulated radiation therapy depending on the beam orientation. Attenuation should be considered and corrected such as any material under the patient at the treatment planning stage.","PeriodicalId":49640,"journal":{"name":"Radiation medicine","volume":"26 9","pages":"539-44"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s11604-008-0271-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27858067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 26