Masao Yuasa

Tokushima University Hospital

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Kaoru Kobayashi

International University of Health and Welfare

Masahiro Imanaka

Tsurumi University

Chinami Igarashi

Tsurumi University

Yumi Kimura

Tsuda University

Akira Yamamoto

High Energy Accelerator Research Organization

Kazuya Honda

Sapporo Medical University

Masahiro Ueno

Tokai Central Hospital

Masao Araki

National Sagamihara Hospital

Kazuo Iwai

Kyoto University

Koji Shinoda

Kyushu University

Cooperative Institutions

Tokushima University

Nihon University

Niigata University

Tohoku University

Tsurumi University

Osaka University

The University of Tokyo

Tokyo Medical and Dental University

Hiroshima University

National Medical Research Center of Dentistry and Maxillofacial Surgery

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Can computed tomography differentiate adenocarcinoma in situ from minimally invasive adenocarcinoma?

Thoracic Cancer (2021)

Mitsuteru Yoshida Masao Yuasa Hirohisa Ogawa Naoki Miyamoto Yukikiyo Kawakami

Abstract Background Given the subtle pathological signs of adenocarcinoma in situ (AIS) and minimally invasive adenocarcinoma (MIA), effective differentiation between the two entities is crucial. However, it is difficult to predict these conditions using preoperative computed tomography (CT) imaging. In this study, we investigated whether histological diagnosis of AIS and MIA using quantitative three‐dimensional CT imaging analysis could be predicted. Methods We retrospectively analyzed the images and histopathological findings of patients with lung cancer who were diagnosed with AIS or MIA between January 2017 and June 2018. We used Synapse Vincent (v. 4.3) (Fujifilm) software to analyze the CT attenuation values and performed a histogram analysis. Results There were 22 patients with AIS and 22 with MIA. The ground‐glass nodule (GGN) rate was significantly higher in patients with AIS ( p < 0.001), whereas the solid volume ( p < 0.001) and solid rate ( p = 0.001) were significantly higher in those with MIA. The mean ( p = 0.002) and maximum ( p = 0.025) CT values were significantly higher in patients with MIA. The 25th, 50th, 75th, and 97.5th percentiles (all p < 0.05) for the CT values were significantly higher in patients with MIA. Conclusions We demonstrated that quantitative analysis of 3D‐CT imaging data using software can help distinguish AIS from MIA. These analyses are useful for guiding decision‐making in the surgical management of early lung cancer, as well as subsequent follow‐up.

Ground-glass opacity

Pulmonary adenocarcinoma

Nodule (geology)

10.1111/1759-7714.13838

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Accuracy of intraoral radiography, multidetector helical CT, and limited cone-beam CT for the detection of horizontal tooth root fracture

Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontology (2009)

Masahiro Iikubo Kaoru Kobayashi Akira Mishima Shinji Shimoda Takayoshi Daimaruya

Cone-Beam CT

Tooth root

Tooth Fracture

10.1016/j.tripleo.2009.07.009

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Citations (64)

Prevalence of Bone Change in the Condyle with Panorama Radiographic Findings-For Patients Having No Complaint in Temporomandibular Joint-

Nihon Hotetsu Shika Gakkai Zasshi (2003)

Yasuko Takayama Norio Takishin Toshio Hosoi Masao Yuasa Kaoru Kobayashi

目的: 本研究は, 顎関節症を主訴とせず, 歯や歯周組織などの観察を目的に撮影されたパノラマX線像を対象に, 下顎頭骨変化の出現頻度を調査し, 骨変化と年齢, 性別, 欠損型や咬合の支持との関連について検討を加えたものである.方法: 1999年12月から2000年3月の間に鶴見大学歯学部附属病院で, 各科から依頼され, 画像検査部においてパノラマX線撮影を行った25歳以上の患者, 970名を対象として調査を行った. 下顎頭の骨変化としてErosion, Osteophyte, Deformityを評価し, さらに年齢, 性別, 欠損型, 咬合の支持 (Eichnerの分類に準じた分類) について検討を加えた.結果: 調査対象970名中, 骨変化を認めたものは113名 (11.6%) で, 出現頻度は男性よりも女性に高かった (有意差あり, 女性14.4%, 男性7.8%).女性では, 骨変化の出現頻度は各年代ともに大きな差はなく, 年齢, 欠損型, 咬合の支持では有意差は認められなかった. 男性では咬合の支持の減少と65歳以上の年齢で骨変化の出現頻度が高くなる傾向にあった. 骨変化所見はDeformityが最も多く, Deformity, Erosionは若い層に, Osteophyteは高齢者層に多かった.結論: 顎関節症を主訴としない患者の11.6%に下顎頭の骨変化が認められ, 出現頻度は性別によって大きく異なることが判明した.

Panorama

Bone erosion

10.2186/jjps.47.343

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A Radiological Study of Perforation of the TMJ Articular Disc : Morphological Analysis with the Mandibular Fossa

歯科放射線 (1998)

Kazuya Honda Kaoru Kobayashi Masahiro Ueno Chinami Igarashi Masao Yuasa

Perforation

Fossa

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Abstracts—Dental radiology vol. 40, 2000

Oral Radiology (2001)

Takenori Noikura Masao Araki Yoshinori Arai Koji Hashimoto Koji Shinoda

10.1007/bf02489733

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Diagnostic Performance of T2-Weighted MR Image for Perforation of Articular Disc and Retrodiscal Tissue of the Temporomandibular Joint

歯科放射線 (2000)

Masahiro Imanaka Kaoru Kobayashi Akira Yamamoto Chinami Igarashi Masao Yuasa

Perforation

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Evaluation of extended thymectomy approaches based on residual fat tissue

Interactive Cardiovascular and Thoracic Surgery (2020)

Mitsuteru Yoshida Masao Yuasa Kazuya Kondo Mitsuhiro Tsuboi Naoya Kawakita

This study analysed the patterns of extraction ranges, characteristics, advantages and disadvantages of median sternotomy (MS) and subxiphoid (SX) approaches for extended thymectomy.This study included patients with anterior mediastinum tumour and myasthenia gravis who underwent extended thymectomy at our institution between 2015 and 2018. There were 5 MS and 6 SX extended thymectomy surgeries with the VINCENT software. On preoperative computed tomography, the thymus area and fat tissue surrounding the thymus, which were planned for extraction, were traced using VINCENT (Ver. 4.0). We then constructed three-dimensional images and calculated the volumes. Evaluation of the extended thymectomy approach based on the residual fat tissue was required to determine the area of extended thymectomy.No significant differences in operation time (min) [SX: 197.3 ± 34.0, MS: 206.6 ± 91.4, drainage duration (days), SX: 2.2 ± 1.0, MS: 2.2 ± 0.4, hospital stay (days), SX: 11.8 ± 1.2, MS: 13.4 ± 2.1, residual rate (%), SX: 29.9 ± 17.5, MS: 58.7 ± 18.0 (P = 0.0519)] were observed between the 2 groups. Bleeding was significantly lower for SX than for MS. The residual rate was lower for SX than for MS.Considering the amount of the residual fat tissue, the SX approach allows an adequate dissection area for extended thymectomy compared with the MS approach.

Thymectomy

10.1093/icvts/ivaa242

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Citations (4)

Clinical and MR assessments

Chinami Igarashi Kaoru Kobayashi Masahiro Imanaka Masao Yuasa Akira Yamamoto

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Extreme leanness, lower skeletal muscle quality, and loss of muscle mass during treatment are predictors of poor prognosis in cervical cancer treated with concurrent chemoradiation therapy

International Journal of Clinical Oncology (2022)

Akiko Abe Masao Yuasa Yoshie Imai Tomohiro Kagawa Ayuka Mineda