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390 results on '"Ochi, Takahiro"'

10. Diagnosis and management of intercostal intramuscular hemangioma: an updated review.

Author

Ochi, Takahiro, Sekine, Yasuo, Koh, Eitetsu, Hoshino, Hidehisa, and Nakazawa, Tadao

Subjects
*SURGICAL margin, *RIB fractures, *HEMANGIOMAS, *CHEST endoscopic surgery, *DIAGNOSIS, *VIDEO-assisted thoracic surgery, *SURGICAL excision, TUMOR surgery
Abstract

Background: Intramuscular hemangioma (IMH) is an uncommon type of hemangioma, and primary IMH of the intercostal muscle is even rarer. Only a few reports describe IMH of the intercostal muscle, and there are no review articles on this topic. We report our experience with a younger female patient, who underwent video-assisted thoracic surgery with tumor resection and review the previous literatures of intercostal IMH. Case presentation: An asymptomatic 17-year-old woman showed a 29-mm, homogeneous, intrathoracic nodule in the left chest wall, attached to the second and third ribs on computed tomography. We performed exploratory thoracoscopic surgery and the tumor was excised without surrounding rib resection. Histopathologic examination of the surgical specimen revealed proliferation of small blood vessels within the surrounding striated muscle, leading to the diagnosis of intercostal IMH. The surgical margin was negative. The patient's postoperative course was uneventful, and there has been no evidence of recurrence for more than 18 months after surgery. Conclusions: We describe a case of intercostal IMH, who received tumor resection with clear excision margin without surrounding rib resection. Preoperative diagnosis is challenging due to its rarity, but intercostal IMH should be recalled as a differential diagnosis of chest wall tumor. Tumor excision without surrounding rib resection is acceptable for intercostal IMH, when there is a good possibility of achieving negative surgical margin. [ABSTRACT FROM AUTHOR]

Published
2023
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23. Dynamics of thoracic endometriosis in the pleural cavity.

Author

Ochi, Takahiro, Kurihara, Masatoshi, Tsuboshima, Kenji, Nonaka, Yuto, and Kumasaka, Toshio

Subjects
*ENDOMETRIOSIS, *PLEURA, *CHEST endoscopic surgery, *PNEUMOTHORAX
Abstract

Background: Thoracic endometriosis-related pneumothorax is a secondary spontaneous pneumothorax caused by thoracic endometriosis. Diaphragmatic endometriosis is well-studied, but visceral and/or parietal pleural lesions are not. Although surgery is an effective treatment, postoperative recurrence rates are unsatisfactory probably due to inadequate understanding of underlying pathophysiology. We aimed to clarify the clinicopathological features of thoracic endometriosis. Methods: In total, 160 patients who underwent thoracoscopic surgery from a single institution with histopathologically proven thoracic endometriosis from January 2015 to December 2019 were included. Clinicopathological characteristics and surgical outcomes were assessed retrospectively. Results: The cohort median age was 41 (range 22–53) years. Pneumothorax was right-sided in 159 (99.4%) and left-sided in only 1 (0.6%) case. Visceral and parietal pleural lesions were diagnosed in 79 (49.4%) and 71 (44.4%) patients, respectively. In total, 104 visceral pleural lesions and 101 parietal pleural lesions were detected. The S4 region and the dorsal 6th intercostal space contained the largest number of visceral pleural (66 lesions) and parietal pleural lesions (25 lesions), respectively. Histopathological evaluation revealed endometriotic tissues, existing in the outer external elastic layer in all lesions, were localized or invaded deeply. The median follow-up period was 370 (range, 6–1824) days. The Kaplan-Meier method revealed that the 1- and 2-year postoperative recurrence rates were 13.8% and 19.3%, respectively. Conclusions: Visceral pleural endometriotic lesions may be disseminated from the visceral pleural surface and infiltrate into the pleura. Intraoperatively, careful observation of the specific sites, such as the visceral pleura of S4 and the parietal pleura of 6th intercostal space, is important to reduce postoperative recurrence. [ABSTRACT FROM AUTHOR]

Published
2022
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26. Effects of unipedal standing balance exercise on the prevention of falls and hip fracture among clinically defined high-risk elderly individuals: a randomized controlled trial

Author

Sakamoto, Keizo, Nakamura, Toshitaka, Hagino, Hiroshi, Endo, Naoto, Mori, Satoshi, Muto, Yoshiteru, Harada, Atsushi, Nakano, Tetsuo, Itoi, Eiji, Yoshimura, Mitsuo, Norimatsu, Hiromichi, Yamamoto, Hiroshi, Ochi, Takahiro, and Committee on Osteoporosis of The Japanese Orthopaedic Association

Published
2006
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29. Fluoroscopic bone fragment tracking for surgical navigation in femur fracture reduction by incorporating optical tracking of hip joint rotation center

Author

Nakajima, Yoshikazu, Tashiro, Takahito, Sugano, Nobuhiko, Yonenobu, Kazuo, Koyama, Tsuyoshi, Maeda, Yuki, Tamura, Yuichi, Saito, Masanobu, Tamura, Shin'ichi, Mitsuishi, Mamoru, Sugita, Naohiko, Sakuma, Ichiro, Ochi, Takahiro, and Matsumoto, Yoichiro

Subjects
Femur -- Injuries, Fractures -- Care and treatment, Fractures -- Medical examination, Diagnosis, Fluoroscopic -- Methods, Hip joint -- Medical examination, Biomechanics -- Research, Biological sciences, Business, Computers, Health care industry
Abstract

A new method for fluoroscopic tracking of a proximal bone fragment in femoral fracture reduction is presented. The proposed method combines 2-D and 3-D image registration from single-view fluoroscopy with tracking of the head center position of the proximal femoral fragment to improve the accuracy of fluoroscopic registration without the need for repeated manual adjustment of the C-arm as required in stereo-view registrations. Kinematic knowledge of the hip joint, which has a positional correspondence with the femoral head center and the pelvis acetabular center, allows the position of the femoral fragment to be determined from pelvis tracking. The stability of the proposed method with respect to fluoroscopic image noise and the desired continuity of the fracture reduction operation is demonstrated, and the accuracy of tracking is shown to be superior to that achievable by single-view image registration, particularly in depth translation. Index Terms--Fluoroscopic bone fragment tracking, fracture reduction, kinematic knowledge of the hip joint, motion constraint.

Published
2007

40. Limits on the accuracy of 3-D thickness measurement in magnetic resonance images--effects of voxel anisotropy

Author

Sato, Yoshinobu, Tanaka, Hisashi, Nishii, Takashi, Nakanishi, Katsuyuki, Sugano, Nobuhiko, Kubota, Tetsuya, Nakamura, Hironobu, Yoshikawa, Hideki, Ochi, Takahiro, and Tamura, Shinichi

Subjects
Magnetic resonance imaging -- Research, Articular cartilage -- Research, Business, Electronics, Electronics and electrical industries, Health care industry
Abstract

Measuring the thickness of sheet-like thin anatomical structures, such as articular cartilage and brain cortex, in three-dimensional (3-D) magnetic resonance (MR) images is an important diagnostic procedure. This paper investigates the fundamental limits on the accuracy of thickness determination in MR images. We defined thickness here as the distance between the two sides of boundaries measured at the subvoxel resolution, which are the zero-crossings of the second directional derivatives combined with Gaussian blurring along the normal directions of the sheet surface. Based on MR imaging and computer postprocessing parameters, characteristics for the accuracy of thickness determination were derived by a theoretical simulation. We especially focused on the effects of voxel anisotropy in MR imaging with variable orientation of sheet-like structure. Improved and stable accuracy features were observed when the standard deviation of Gaussian blurring combined with thickness determination processes was around [square root of 2/2] times as large as the pixel size. The relation between voxel anisotropy in MR imaging and the range of sheet normal orientation within which acceptable accuracy is attainable was also clarified, based on the dependences of voxel anisotropy and the sheet normal orientation obtained by numerical simulations. Finally, in vitro experiments were conducted using an acrylic plate phantom and a resected femoral head to validate the results of theoretical simulation. The simulated thickness was demonstrated to be well-correlated with the actual in vitro thickness. Index Terms--Articular cartilage, brain cortex, point spread function, quantitative image analysis, spatial resolution, thickness determination, three-dimensional imaging.

Published
2003

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