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Japanese Journal of Radiology

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https://www.readbyqxmd.com/read/28639211/selective-venous-sampling-for-primary-hyperparathyroidism-how-to-perform-an-examination-and-interpret-the-results-with-reference-to-thyroid-vein-anatomy
#1
REVIEW
Takayuki Yamada, Masaya Ikuno, Yasumoto Shinjo, Atsushi Hiroishi, Shoichiro Matsushita, Tsuyoshi Morimoto, Reiko Kumano, Kunihiro Yagihashi, Takuyuki Katabami
Primary hyperparathyroidism (pHPT) causes hypercalcemia. The treatment for pHPT is surgical dissection of the hyperfunctioning parathyroid gland. Lower rates of hypocalcemia and recurrent laryngeal nerve injury imply that minimally invasive parathyroidectomy (MIP) is safer than bilateral neck resection. Current trends in MIP use can be inferred only by reference to preoperative localization studies. Noninvasive imaging studies (typically preoperative localization studies) show good detection rates of hyperfunctioning glands; however, there have also been cases of nonlocalization or discordant results...
June 21, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28620714/the-outcome-of-i-131-ablation-therapy-for-intermediate-and-high-risk-differentiated-thyroid-cancer-using-a-strict-definition-of-successful-ablation
#2
Ken Watanabe, Mayuki Uchiyama, Kunihiko Fukuda
PURPOSE: This article examines the outcome of radioactive iodine ablation therapy for thyroid cancer in high-risk patients and investigates background factors influencing ablation failure. MATERIALS AND METHODS: We included 91 patients in this retrospective analysis and evaluated the ablation success rate. Successful ablation was defined as the absence of visible iodine-131 (I-131) accumulation in the thyroid bed after whole-body scans and thyroglobulin levels <2 ng/ml in a TSH-stimulated state after ablation...
June 15, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28612288/magnetic-resonance-image-guidance-in-external-beam-radiation-therapy-planning-and-delivery
#3
REVIEW
Ilamurugu Arivarasan, Chandrasekaran Anuradha, Shanmuga Subramanian, Ayyalusamy Anantharaman, Velayudham Ramasubramanian
The use of magnetic resonance (MR) imaging in radiation oncology is improving dramatically. This review article discusses the necessity of image guidance and how MR finds a significant place in radiotherapy planning and delivery. The challenges to and current solutions for an in-house MR simulation, dedicated MR simulator, estimation of electron density using MR image sets and development of MR-compatible treatment planning systems are presented. This article also reviews the feasibility, advantages and limitations of MR image-guided radiation therapy (MR-IGRT) and its drive toward the integration of radiation beams with MR technology...
June 13, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28608003/transarterial-chemoembolization-for-management-of-hemoptysis-initial-experience-in-advanced-primary-lung-cancer-patients
#4
Akihiko Seki, Chigusa Shimono
PURPOSE: To evaluate the hemostatic effects of transarterial infusion chemotherapy in addition to embolization (chemoembolization) for advanced primary lung cancer with tumor-related hemoptysis. MATERIALS AND METHODS: Ten consecutive patients with stage IIIB/IV or recurrent primary lung cancer (squamous cell carcinoma in six, adenocarcinoma in four) who underwent chemoembolization for control of hemoptysis were enrolled. At enrollment, five patients were considered refractory and five had contraindications to standard therapies...
June 12, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28608002/value-of-ultrasonographic-evaluation-for-soft-tissue-lesions-focus-on-incidentally-detected-lesions-on-ct-mri
#5
REVIEW
Sung Bin Park, Byeong Seong Kang
Soft-tissue lesions of the musculoskeletal system are commonly encountered in clinical practice and often manifest as palpable lesions. Moreover, the increasing use of cross-sectional imaging such as CT or MRI has resulted in the incidental detection of many soft-tissue lesions. Ultrasonography remains the primary imaging investigation for soft-tissue lesions. It has been shown to be helpful in depicting processes involving the soft-tissue lesions on cross-sectional imaging. This article describes the ultrasonographic findings of the most frequently incidentally detected benign and malignant soft-tissue lesions on cross-sectional imaging and suggests the characteristics of such diseases, focusing on the ultrasonographic features that allow accurate diagnosis...
June 12, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28589507/biliary-stone-removal-through-the-percutaneous-transhepatic-biliary-drainage-route-focusing-on-the-balloon-sphincteroplasty-flushing-technique-a-single-center-study-with-916-patients
#6
Jong Soo Shin, Hyung Jin Shim, Byung Kook Kwak, Hyun-Ki Yoon
PURPOSE: To present our experience in biliary stone removal (BSR) through the percutaneous transhepatic biliary drainage (PTBD) route in 916 patients, and discuss its clinical usefulness. MATERIALS AND METHODS: From 2001 to 2015, 916 patients (479 male patients and 437 female patients; age range, 22-92 years; mean age, 67 years) with 52 recurring cases, so a total of 968 cases, were enrolled in this study and retrospectively reviewed. PTBD was performed in all patients...
June 6, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28584958/a-predictive-diagnostic-model-using-multiparametric-mri-for-differentiating-uterine-carcinosarcoma-from-carcinoma-of-the-uterine-corpus
#7
Yuki Kamishima, Mitsuru Takeuchi, Tatsuya Kawai, Takatsune Kawaguchi, Ken Yamaguchi, Naoki Takahashi, Masato Ito, Toshinao Arakawa, Akiko Yamamoto, Kazushi Suzuki, Masaki Ogawa, Moe Takeuchi, Yuta Shibamoto
PURPOSE: To construct a diagnostic model for differentiating carcinosarcoma from carcinoma of the uterus. MATERIALS AND METHODS: Twenty-six patients with carcinosarcomas and 26 with uterine corpus carcinomas constituted a derivation cohort. The following nine MRI features of the tumors were evaluated: inhomogeneity, predominant signal intensity, presence of hyper- and hypointense areas, conspicuity of tumor margin, cervical canal extension on T2WI, presence of hyperintense areas on T1WI, contrast defect area volume percentage, and degree of enhancement...
June 5, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28550357/apparent-diffusion-coefficient-in-differentiation-of-pediatric-posterior-fossa-tumors
#8
Soubhi Zitouni, Gonca Koc, Selim Doganay, Sibel Saracoglu, Kazim Z Gumus, Saliha Ciraci, Abdulhakim Coskun, Ekrem Unal, Huseyin Per, Ali Kurtsoy, Olgun Kontas
PURPOSE: To investigate the contribution of preoperative apparent diffusion coefficient (ADC) values in the differential diagnosis of pediatric posterior fossa tumors. METHODS: Forty-two pediatric patients (mean age 7.76 ± 4.58 years) with intra-axial tumors in the infra-tentorial region underwent magnetic resonance imaging. ADC measurement was performed using regions of interest, obtained from the solid component of the mass lesions. ADC ratios were calculated by dividing the ADC values from the mass lesions by the ADC values from normal cerebellar parenchyma...
May 26, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28550356/orbital-malignant-lesions-in-adults-multiparametric-mr-imaging
#9
Bo Sun, Liyuan Song
PURPOSE: To assess the benefit of combining diffusion-weighted imaging and dynamic contrast-enhanced (DCE) MR imaging in the preoperative evaluation of orbital lymphoma and other malignancies in adults. MATERIALS AND METHODS: This retrospective study was institutional review board-approved and informed consent was waived. Pretreatment MR imaging was performed in 52 patients with malignant orbital lesions. Apparent diffusion coefficient (ADC) and DCE MR parameters were evaluated in 30 patients with orbital lymphoma and 22 patients with other orbital malignancies...
May 26, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28550355/coronary-computed-tomography-angiography-using-128-slice-dual-source-computed-tomography-in-patients-with-severe-calcification
#10
Suguru Sato, Yosuke Horii, Norihiko Yoshimura, Takuya Yagi, Hidefumi Aoyama
PURPOSE: To compare coronary computed tomography angiography (CTA) and coronary angiography (CAG) with regard to luminal graphic definition of calcified segments using 128-slice dual-source computed tomography (DSCT), specifically for patients with an Agatston score >400. MATERIALS AND METHODS: Of 1148 consecutive patients who underwent coronary CTA using a 128-slice DSCT, 132 subjects had severe calcification with an Agatston score >400. Thirty-nine of the 132 patients who had undergone CAG within 3 months before or after coronary CTA were included...
May 26, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28540464/comparison-of-lesion-enhancement-between-bb-cube-and-3d-spgr-images-for-brain-tumors-with-1-5-t-magnetic-resonance-imaging
#11
Hirokazu Hasegawa, Ryuichiro Ashikaga, Kaoru Okajima, Tetsuya Wakayama, Mitsuharu Miyoshi, Yasumasa Nishimura, Takamichi Murakami
PURPOSE: This study aimed to compare the detectability of neoplastic lesion enhancement after gadolinium-based contrast media injection in three-dimensional T1-weighted black blood Cube (3D-T1W BB Cube) and three-dimensional T1-weighted fast spoiled gradient-echo (3D-T1W fast SPGR) images obtained with 1.5-T magnetic resonance imaging (MRI). MATERIALS AND METHODS: Phantom and clinical studies were performed to compare the lesion detectability and contrast ratio (CR) between 3D-T1W BB Cube and 3D-T1W fast SPGR pulse sequences...
May 24, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28528467/changes-in-deviation-of-absorbed-dose-to-water-among-users-by-chamber-calibration-shift
#12
Tetsurou Katayose, Hidetoshi Saitoh, Mitsunobu Igari, Weishan Chang, Shimpei Hashimoto, Mie Morioka
PURPOSE: The JSMP01 dosimetry protocol had adopted the provisional (60)Co calibration coefficient [Formula: see text], namely, the product of exposure calibration coefficient N C and conversion coefficient k D,X. After that, the absorbed dose to water D w standard was established, and the JSMP12 protocol adopted the [Formula: see text] calibration. In this study, the influence of the calibration shift on the measurement of D w among users was analyzed. MATERIALS AND METHODS: The intercomparison of the D w using an ionization chamber was annually performed by visiting related hospitals...
May 20, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28528466/utility-of-mr-imaging-in-the-evaluation-of-colon-cancer-emphasis-on-distinguishing-tumor-tissue-from-fibrosis-and-role-of-contrast-media
#13
LETTER
Akitoshi Inoue, Shinichi Ohta, Norihisa Nitta, Masahiro Yoshimura, Tomoharu Shimizu, Masaji Tani, Ryoji Kushima, Kiyoshi Murata
No abstract text is available yet for this article.
May 20, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28528465/contrast-induced-nephropathy-cin-of-patients-with-renal-dysfunction-in-ct-examination
#14
Yasuhiro Fukushima, Hitomi Miyazawa, Junpei Nakamura, Ayako Taketomi-Takahashi, Takayuki Suto, Yoshito Tsushima
PURPOSE: To investigate the incidence and risk factors of contrast induced nephropathy (CIN) after contrast enhanced (CE) computed tomography (CT) in patients with renal dysfunction. MATERIALS AND METHODS: Two hundred sixteen inpatients with estimated glomerular filtration rates (eGFR) <60 ml/min/1.73 m(2) underwent CE CT using iodine doses of 420 or 480 mg I/kg. Data of all enrolled patients was collected for baseline serum creatinine level (SCr), post-CE CT SCr within 3 days after CE CT, and conditions considered risk factors for CIN [renal dysfunction, contrast media dose, advanced age, diabetes mellitus, no intravenous hydration, cardiac dysfunction (left ventricular ejection fraction <60%) and intensive-care unit (ICU) admission]...
May 20, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28501975/changes-in-liver-perfusion-and-function-before-and-after-percutaneous-occlusion-of-spontaneous-portosystemic-shunt
#15
Yasukazu Kako, Koichiro Yamakado, Wataru Jomoto, Toshiya Nasada, Koichiro Asada, Haruyuki Takaki, Kaoru Kobayashi, Takashi Daimon, Shozo Hirota
PURPOSE: To evaluate changes in liver perfusion after occlusion of spontaneous portosystemic shunt and to analyze mechanisms of liver profile improvement. MATERIALS AND METHODS: Liver function changes and portal venous and hepatic arterial blood flow were evaluated using perfusion CT before and after shunt occlusion in 23 patients who underwent percutaneous occlusion of spontaneous portosystemic shunt because of gastric varices (n = 15) or hepatic encephalopathy (n = 8)...
May 13, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28497349/suv-navigator-enables-rapid-18-f-fdg-pet-ct-image-interpretation-compared-with-2d-roi-and-3d-voi-evaluations
#16
Atsutaka Okizaki, Michihiro Nakayama, Shunta Ishitoya, Kaori Nakajima, Masaaki Yamashina, Tamio Aburano, Koji Takahashi
PURPOSE: Positron emission tomography (PET) and the maximum standardized uptake value (SUVmax) is a useful technique for assessing malignant tumors. Measurements of SUVmax in multiple lesions per patient frequently require many time-consuming procedures. To address this issue, we designed a novel interface named SUV Navigator (SUVnavi), and the purpose of this study was to investigate its utility. MATERIALS AND METHODS: We measured SUVmax in 661 lesions from 100 patients with malignant tumors...
May 11, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28488205/the-value-of-initial-sonography-compared-to-supplementary-ct-for-diagnosing-right-sided-colonic-diverticulitis
#17
Ju Hwa Min, Hyun Cheol Kim, Sang Won Kim, Dal Mo Yang, Sun Jung Rhee, Jiyoung Oh, Sung Eun Ahn
PURPOSE: The purpose of the study was to assess the value of initial sonography in the diagnosis of right-sided colonic diverticulitis in comparison with supplementary CT. MATERIALS AND METHODS: A total of 183 consecutive adult patients with right lower quadrant pain (73 diverticulitis, and 110 non-diverticulitis) who underwent both initial sonography and subsequent CT within 24 h were enrolled in this study. Two reviewers retrospectively assessed imaging findings of diverticula, colonic wall thickening, inflammatory pericolic fat, and pericolic abscess for each sonography and CT and then classified each case as non-diverticulitis, simple diverticulitis or complicated diverticulitis...
May 9, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28474300/uncertainty-of-cosmetic-evaluation-after-accelerated-partial-breast-irradiation-interim-analysis-of-a-japanese-prospective-multi-institutional-feasibility-study
#18
Eisaku Yoden, Takayuki Nose, Yuki Otani, Shuuji Asahi, Iwao Tsukiyama, Takushi Dokiya, Toshiaki Saeki, Ichirou Fukuda, Hiroshi Sekine, Naoto Shikama, Yu Kumazaki, Takao Takahashi, Ken Yoshida, Tadayuki Kotsuma, Norikazu Masuda, Kazutaka Nakashima, Taisei Matsumura, Shino Nakagawa, Seiji Tachiiri, Yoshio Moriguchi, Jun Itami, Masahiko Oguchi
PURPOSE: We conducted a multi-institutional prospective study on accelerated partial breast irradiation (APBI) using interstitial brachytherapy. The clinical results over a minimum follow-up period of 30 months are presented here. MATERIALS AND METHODS: Forty-six patients with breast cancer were treated with breast-conserving surgery and postoperative APBI. After confirmation of negative surgical margins and negative lymph nodes, a high-dose-rate brachytherapy protocol of 36 Gy/6 fractions was carried out...
May 4, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28451938/quantitative-accuracy-of-computed-tomography-perfusion-under-low-dose-conditions-measured-using-a-hollow-fiber-phantom
#19
Kazufumi Suzuki, Hiroyuki Hashimoto, Eiji Okaniwa, Hiroshi Iimura, Shingo Suzaki, Kayoko Abe, Shuji Sakai
PURPOSE: The purpose of this study was to investigate the quantitative accuracy under low-dose conditions on computed tomography (CT) perfusion using a hollow-fiber phantom that had the theoretical absolute values of perfusion indices. MATERIALS AND METHODS: Our phantom comprised two components, i.e., a hollow-fiber hemodialyzer to pump the diluted contrast material and a surrounding syringe-shaped X-ray-absorbing body to simulate the absorption of X-rays by a brain and cranium...
April 27, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28451937/thin-section-ct-findings-of-thoracolithiasis
#20
Thitiporn Suwatanapongched, Chayanin Nitiwarangkul
PURPOSE: To review thin-section CT findings of thoracolithiasis. MATERIALS AND METHODS: Thirty-three thin-section CT scans of 9 patients with thoracolithiasis diagnosed between 2008 and 2016 were reviewed for the location, shape, longest diameter, and calcification of each freely mobile nodule (thoracolith) and for the presence of coexisting abnormalities. RESULTS: The mean age of 9 patients (5 women) was 65.8 years (SD 14.9; range 37-83 years)...
April 27, 2017: Japanese Journal of Radiology
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