المؤلفون: Sekino, Y., Endo, H., Yamada, E., Sakai, E., Ohkubo, H., Higurashi, T., Iida, H., Hosono, K., Takahashi, H., Koide, T., Nonaka, T., Abe, Y., Gotoh, E., Maeda, S., Nakajima, A., Inamori, M.

المصدر: Colorectal Disease ; volume 14, issue 10 ; ISSN 1462-8910 1463-1318

الوصف: Aim A case‐controlled study was performed to investigate the association of colonic angiectasia with other conditions and to identify risk factors for bleeding. Method Information was collected from all patients who underwent colonoscopy at our hospital between January 2008 and December 2010. Data on 90 individuals with angiectasia [58 men; median age 69 (26–92) years] were compared with those of 180 individuals without angiectasia, matched for gender and age. Results Multivariate analysis showed that occult gastrointestinal bleeding [odds ratio (OR) 2.523; 95% confidence interval (CI) 1.238–5.142], liver cirrhosis (OR 13.195; 95% CI 3.502–49.711), chronic renal failure (OR 6.796; 95% CI 1.598–28.904) and valvular heart disease (OR 6.425; 95% CI 1.028–40.165) were identified as significant predictors of the presence of colonic angiectasia. Eight patients were diagnosed with bleeding from angiectasia. Cardiovascular disease (OR 22.047; 95% CI 1.063–457.345) and multiple angiectasias ( P ‐value 0.0019) were identified as significant risk factors for active bleeding. Medication and a large size were not associated with an increased risk of bleeding. Conclusion The presence of colonic angiectasia was associated with valvular heart disease, liver cirrhosis and chronic renal failure. Valvular heart disease and multiple lesions increased the risk of bleeding.

الإتاحة: https://doi.org/10.1111/j.1463-1318.2012.03132.xTest

المؤلفون: Matsubara, K, Koshida, H, Takata, T, Horii, J, Iida, H, Koshida, K, Matsui, O, Fukuda, A

المصدر: Medical Physics ; volume 39, issue 6Part3, page 3619-3619 ; ISSN 0094-2405 2473-4209

الوصف: Purpose: In X‐ray computed tomography (CT), X‐rays are significantly less attenuated in the anteroposterior direction and more in the lateral direction. Therefore, the tube current should be adjusted within one gantry rotation using angular tube current modulation (TCM). The aim of this study was to evaluate whether online angular TCM could reduce radiation dose appropriately. Methods: A 128‐detector dual‐source CT (SOMATOM Definition Flash; Siemens Healthcare, Erlangen, Germany) and an online TCM system (CARE Dose 4D; Siemens Healthcare) were used. Dose profiles were acquired using the CT Dose Profiler (RTI Electronics, Molndal, Sweden) and an elliptical cylindrical phantom (MHT; Kyoto Kagaku, Kyoto, Japan) for helical CT scans with and without TCM. In addition, absorbed dose distributions within a single section were acquired using an anthropomorphic phantom (RANI 10; The Phantom Laboratory, Salem, NY) and radiophotoluminescent glass dosimeters (RPLDs) (GD‐ 302M; Chiyoda Technol, Tokyo, Japan) for helical CT scans with and without TCM after placing RPLDs within all holes of one section and pasting them around the section. A graph of each absorbed dose distribution was drawn using graphing software (ORIGIN 8.6; OriginLab, Northampton, MA). Results: The acquired dose profiles suggested that online angular TCM could adjust the tube current in near‐real time according to the attenuation measured from the previous projection. The profiles gradually stabilized because the tube current was adjusted properly. The absorbed doses were low and the distributions were stable with TCM compared with those without TCM. Conclusions: In X‐ray CT, an online angular TCM can reduce radiation dose effectively by adjusting tube current within one gantry rotation in near‐real time.

الإتاحة: https://doi.org/10.1118/1.4734693Test

المؤلفون: Mawatari, H., Yoneda, M., Fujita, K., Nozaki, Y., Shinohara, Y., Sasaki, H., Iida, H., Takahashi, H., Inamori, M., Abe, Y., Kobayashi, N., Kubota, K., Kirikoshi, H., Nakajima, A., Saito, S.

المصدر: Journal of Viral Hepatitis ; volume 17, issue 12, page 859-865 ; ISSN 1352-0504

الإتاحة: https://doi.org/10.1111/j.1365-2893.2009.01253.xTest

المؤلفون: Mawatari, H., Yoneda, M., Fujita, K., Nozaki, Y., Shinohara, Y., Sasaki, H., Iida, H., Takahashi, H., Inamori, M., Abe, Y., Kobayashi, N., Kubota, K., Kirikoshi, H., Nakajima, A., Saito, S.

المصدر: Journal of Viral Hepatitis ; volume 17, issue 4, page 274-279 ; ISSN 1352-0504 1365-2893

الإتاحة: https://doi.org/10.1111/j.1365-2893.2009.01179.xTest

المؤلفون: Abe, Y, Inamori, M, Uchiyama, T, Iida, H, Akimoto, K, Mawatari, H, Nozaki, Y, Hosono, K, Endo, H, Akiyama, T, Yoneda, K, Fujita, K, Yoneda, M, Takahashi, H, Goto, A, Kobayashi, N, Kirikoshi, H, Kubota, K, Saito, S, Nakajima, A

المصدر: Journal of Gastroenterology and Hepatology ; volume 24, issue 2, page 323-323 ; ISSN 0815-9319 1440-1746

الإتاحة: https://doi.org/10.1111/j.1440-1746.2008.05765.xTest

المؤلفون: de Jong, H. W., Lubberink, M., Watabe, H., Iida, H., Lammertsma, A. A.

المصدر: Medical Physics ; volume 36, issue 10, page 4609-4615 ; ISSN 0094-2405 2473-4209

الوصف: Purpose: Regular monitoring of PET scanner performance is mandatory to assure quality of acquired data. While extensive performance measurements include many scanner characteristics such as resolution, count rate, uniformity, sensitivity, and scatter fraction (SF), most daily QC protocols are limited to uniformity and sensitivity measurements. These measurements may be too insensitive to detect more subtle drifts in detector gains that could lead to reduced detection of primary and increased detection of scattered events. Current methods to measure SF, such as those prescribed by the NEMA protocols (SF‐NEMA), however, require specially designed phantoms and are too cumbersome to be performed on a daily basis. Methods: In this study, a simple and versatile method to determine SF is described. This method (SF‐DAILY) does not require additional measurements, making it suitable for daily QC. The method was validated for four different scanners by comparing results with those obtained with the NEMA 1994 protocol. Results: For all scanner types and acquisition modes, excellent agreement was found between SF‐NEMA and SF‐DAILY. Conclusions: The proposed method is a very practical and valuable addition to current daily QC protocols. In addition, the method can be used to accurately measure SF in phantoms with other dimensions than the NEMA phantom.

الإتاحة: https://doi.org/10.1118/1.3213096Test

المؤلفون: Yokoyama, I., Inoue, Y., Kinoshita, T., Itoh, H., Kanno, I., Iida, H.

المصدر: Acta Physiologica ; volume 193, issue 3, page 303-308 ; ISSN 1748-1708 1748-1716

الوصف: Aim: To compare blood flow response to arterial carbon dioxide tension change in the heart and brain of normal elderly men. Methods: Thirteen healthy elderly male volunteers were studied. Hypercapnea was induced by carbon dioxide inhalation and hypocapnea was induced by hyperventilation. Myocardial blood flow [mL min −1 × (100 g of perfusable tissue) −1 ] and cerebral blood flow [mL min −1 × (100 g of perfusable tissue) −1 ] were measured simultaneously at rest, under carbon dioxide gas inhalation and hyperventilation using the combination of two positron emission tomography scanners. Results: Arterial carbon dioxide tension increased significantly during carbon dioxide inhalation (43.1 ± 2.7 mmHg, P < 0.05) and decreased significantly during hyperventilation (29.2 ± 3.4 mmHg, P < 0.01) from baseline (40.2 ± 2.4 mmHg). Myocardial blood flow increased significantly during hypercapnea (88.7 ± 22.4, P < 0.01) from baseline (78.2 ± 12.6), as did the cerebral blood flow (baseline: 39.8 ± 5.3 vs. hypercapnea: 48.4 ± 10.4, P < 0.05). During hypocapnea cerebral blood flow decreased significantly (27.0 ± 6.3, P < 0.01) from baseline as did the myocardial blood flow (55.1 ± 14.6, P < 0.01). However, normalized myocardial blood flow by cardiac workload [100 mL mmHg −1 × (heart beat) −1 × (gram of perfusable tissue) −1 ] was not changed from baseline (93.4 ± 16.6) during hypercapnea (90.5 ± 14.3) but decreased significantly from baseline during hypocapnea (64.5 ± 18.3, P < 0.01). Conclusion: In normal elderly men, hypocapnea produces similar vasoconstriction both in the heart and brain. Mild hypercapnea increased cerebral blood flow but did not have an additional effect to dilate coronary arteries beyond the expected range in response to an increase in cardiac workload.

الإتاحة: https://doi.org/10.1111/j.1748-1716.2008.01846.xTest

المؤلفون: IIDA, H., FUJISAKI, K.

المصدر: Physiological Entomology ; volume 32, issue 1, page 81-86 ; ISSN 0307-6962 1365-3032

الوصف: Seasonal changes in resource investment into individual offspring are well documented, but no attention has been paid to the allocation of the invested resource among the body parts of the offspring. In the present study, seasonal changes in the absolute and relative sizes in a spiderling of the wolf spider Pardosa pseudoannulata Boes. et Str. are investigated, and the relationship between spiderling body size and the ability to moult during a food shortage is clarified. Spiderlings that emerge in November have a significantly larger cephalothorax and abdomen than those that emerge in June. In addition, the abdomen–cephalothorax size ratio is significantly greater in November than in June offspring. Under limited food availability conditions, only 40% of spiderlings moult. Nymphs that do moult have a significantly larger cephalothorax, abdomen and abdomen–cephalothorax size ratio than nymphs that do not moult. Thus, both the quantity of resources invested in the cephalothorax and abdomen of a spiderling and the proportional allocation of resources between the two body parts change seasonally in Pa. pseudoannulata ; alteration of the resource allocation occurs in late autumn. Larger spiderlings of Pa. pseudoannulata that emerge in late autumn would be able to develop into advanced instars even during food shortage, and therefore may have better overwintering survival rates.

الإتاحة: https://doi.org/10.1111/j.1365-3032.2006.00545.xTest

المؤلفون: MUKOHYAMA, H., HARAGUCHI, M., SUMITA, Y. I., IIDA, H., HATA, Y., KISHIMOTO, S., TANIGUCHI, H.

المصدر: Journal of Oral Rehabilitation ; volume 32, issue 7, page 541-544 ; ISSN 0305-182X 1365-2842

الوصف: summary Rehabilitation of patients who have undergone bilateral maxillectomy is difficult because of extensive loss of bone and soft tissue. In this clinical report, prosthodontic rehabilitation of oral function in a bilateral maxillecitomy patient combined with a new fibular osteocutaneous flap, which was designed to have two oronasal slits for the retention of an obturator prosthesis, was described. A 58‐year‐old man with a maxillary alveolar carcinoma underwent bilateral maxillectomy. The defect was reconstructed using a vascularized fibular bone wrapped circumferentially with a peroneal flap, which was fixed with miniplates between the right malar prominence and cut edge of the left zygoma remaining two slits anterior and posterior to the graft. Two and half weeks after the surgery, a delayed surgical obturator was delivered and an obturator prosthesis was delivered 6 weeks after the surgery. This obturator prosthesis could be extended into the slits to engage the tissue undercuts, and was stable during use. Mastication, deglutition, articulation and the mid‐facial profile of the patient were rehabilitated. After installation of the obturator prosthesis, relining of the prosthesis base was carried out alongside the healing process of the graft, and adjustment of occlusions and high‐pressure spots was carried out. No clinical disorders were observed either in the grafted tissue or the obturator prosthesis with a 3‐year prognosis. Newly designing a fibular osteocutaneous flap combined with tissue‐borne obturator prosthesis is one successful approach to the restoration of oral function, and increases the patient's quality of life after bilateral maxillectomy.

الإتاحة: https://doi.org/10.1111/j.1365-2842.2005.01463.xTest

المؤلفون: Fujita, H., Kitaori, T., Iida, H., Shimizu, K., Hiroshima, Y., Kawanabe, K., Nakamura, T.

المصدر: Journal of Biomedical Materials Research Part B: Applied Biomaterials ; volume 74B, issue 1, page 419-422 ; ISSN 1552-4973 1552-4981

الوصف: A novel intramedullary plug with sliding mechanism has been developed and evaluated clinically in the settings of revision total knee arthroplasty (TKA). The new plug consists of a pair of specially designed components. Each component is shaped like an obliquely cut cylinder. Postoperative plain radiographs of 8 arthroplasties that include 7 stemmed femoral components and 6 stemmed tibial components (total 13 regions) were examined. No radiolucent line between the cement and the cortical bone was observed. Plugging was complete in 11 regions. No migration of the plug was observed. Slight leak of the cement was observed in 2 of 7 femoral components, but not found in tibial components. Our study demonstrated the efficacy of the plug in occluding the femoral and tibial canal completely in 11 out of 13 regions in revision TKAs. © 2005 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2005

الإتاحة: https://doi.org/10.1002/jbm.b.30268Test