Masahiro Imanaka
Tsurumi University
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Featured researches published by Masahiro Imanaka.
Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontology | 2009
Masahiro Iikubo; Kaoru Kobayashi; Akira Mishima; Shinji Shimoda; Takayoshi Daimaruya; Chinami Igarashi; Masahiro Imanaka; Masao Yuasa; Maya Sakamoto; Takashi Sasano
OBJECTIVE The accuracies of intraoral radiography (IOR), multidetector helical computerized tomography (MDHCT) at slice thicknesses 0.63 mm and 1.25 mm, and limited cone-beam computerized tomography (LCBCT) were compared for detection of horizontal tooth root fracture. STUDY DESIGN In 7 beagle dogs, 28 maxillary anterior teeth were used, of which 13 had artificially induced horizontal root fracture. The specimens were examined by the above-mentioned 4 modalities. Diagnosis of root fracture was based on direct visualization of radiolucent line in each image by 6 radiologists. RESULTS Sensitivity, negative predictive value, and diagnostic accuracy (true positives + true negatives) for detecting fracture lines in LCBCT (0.96 +/- 0.04, 0.97 +/- 0.03, 0.93 +/- 0.04, respectively) were significantly higher than MDHCT at 0.63 mm (0.76 +/- 0.09, 0.8 +/- 0.05, 0.8 +/- 0.05, respectively), MDHCT at 1.25 mm (0.49 +/- 0.09, 0.66 +/- 0.04, 0.69 +/- 0.05, respectively), and IOR (0.51 +/- 0.18, 0.67 +/- 0.08, 0.69 +/- 0.08, respectively). Specificity and positive predictive value showed no significant intermethod difference among the 4 modalities. CONCLUSION Limited cone-beam CT is more useful than the other 3 radiographic modalities for diagnostic imaging of horizontal tooth root fracture.
Oral Radiology | 2007
Masahiro Imanaka; Yoshiaki Nomura; Yoh Tamaki; Seiko Katsumura; Yumi Kimura; Chinami Igarashi; Masao Yuasa; Satsuki Wakae; Rin Tanaka; Shinji Shimoda; Kaoru Kobayashi
ObjectivesAn insufficient knowledge of anatomy often complicates the interpretation of radiological findings by students learning clinical medicine. During a 3-week clinical course in oral radiology, students attended lectures on anatomy for half of each day. Our objectives were to evaluate this program and determine why some students remained unmotivated to learn anatomy.MethodsSurveys were carried out using two questionnaires, one for evaluating the students’ beliefs regarding the necessity of knowing anatomy and their understanding of radiology and anatomy, and the other for determining the value of the educational program. In total, 126 questionnaires were analyzed. Structural equation modeling and decision analysis were used to analyze the data obtained.ResultsBeliefs regarding the necessity of knowing anatomy were explained by three variables: the necessity of knowing imaging anatomy, the necessity of knowing gross anatomy, and understanding of anatomy. Awareness of the necessity of knowing anatomy and understanding of graphical images were not strongly correlated. The educational program was characterized by two factors: “value” and “appropriateness” These were strongly correlated. Student interest in the content of the course was found to be the most important factor in student evaluations of the educational program. Students who answered “agree”, “disagree” or “strongly disagree” to three items, “interested in the content of the course”, “obtained knowledge through the course” and “expected the course to be useful in the near future” were likely to have insufficient understanding of and awareness of the necessity of radiology and anatomy.ConclusionsThe inclusion of lectures on anatomy is beneficial for improving student understanding of oral radiology. Student interest in the content is important in evaluations of radiology–anatomy programs.
Journal of Prosthetic Dentistry | 2004
Fujio Tsuchida; Toshio Hosoi; Masahiro Imanaka; Kaoru Kobayashi
European Journal of Dental Education | 2007
Masahiro Imanaka; Yoshiaki Nomura; Yoh Tamaki; Naotake Akimoto; Chieko Ishikawa; Hideyo Takase; Hiroaki Ishii; Shigeo Yamachika; Koji Noda; Masamichi Ide; Ken Yamamoto; Yuji Kokubo; Kanichi Seto
Dentistry in Japan | 1999
Kaoru Kobayashi; Masao Yuasa; Masahiro Imanaka; Chinami Igarashi; Akira Yamamoto
Gakukansetsu Kenkyukaishi | 2000
Chinami Igarashi; Kaoru Kobayashi; Masahiro Imanaka; Masao Yuasa; Akira Yamamoto
歯科放射線 | 1998
Kazuya Honda; Kaoru Kobayashi; Masahiro Ueno; Chinami Igarashi; Masao Yuasa; Masahiro Imanaka; Masao Araki; Kazuo Iwai; Koji Hashimoto; Akira Yamamoto; Koji Shinoda
Oral Radiology | 1997
Tomokazu Fujiki; Toru Wakasa; Yoshinobu Yanagi; Yasutoshi Honda; Noriko Kawai; Kanji Kishi; Takurou Wada; Yasuhiko Morita; Takashi Hiraoka; Tuyoshi Sato; Takenori Noikura; Yoshihiko Hayakawa; Hitoshi Shibuya; Toshimichi Mori; Mamoru Wakoh; Yoshiko Ota; Kinya Kuroyanagi; Naoya Kakimoto; Shumei Murakami; Atsutosi Nakatani; Souhei Furukawa; Hajime Fuchihata; Kenichi Obinata; Tsuyoshi Sawamura; Masanori Kaneko; Keiichi Ohmori; Motoyasu Nakamura; Hidemichi Yuasa; Shinji Okumura; Akiko Hirukawa
Japanese Journal of Radiological Technology | 1997
Yumi Kimura; Akira Mishima; Mamoru Tanaka; Kaoru Kobayashi; Masahiro Imanaka; Akira Yamamoto
Japanese Journal of Radiological Technology | 1995
Yumi Kimura; Mamoru Tanaka; Masahiro Imanaka; Kaoru Kobayashi; Akira Yamamoto