Publications by authors named "Itsuo Kumazawa"

Background: Appropriate skin treatment and care warrants an accurate prediction of skin moisture. However, current diagnostic tools are costly and time-consuming. Stratum corneum moisture content has been measured with moisture content meters or from a near-infrared image.

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Objectives: To develop diagnostic algorithms of multisequence prostate magnetic resonance imaging for cancer detection and segmentation using deep learning and explore values of dynamic contrast-enhanced imaging in multiparametric imaging, compared with biparametric imaging.

Methods: We collected 3227 multiparametric imaging sets from 332 patients, including 218 cancer patients (291 biopsy-proven foci) and 114 noncancer patients. Diagnostic algorithms of T2-weighted, T2-weighted plus dynamic contrast-enhanced, biparametric, and multiparametric imaging were built using 2578 sets, and their performance for clinically significant cancer was evaluated using 649 sets.

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Article Synopsis
  • The study addresses the challenge of interpreting a high volume of medical images by developing a computer-aided diagnosis (CAD) system using deep learning to detect urinary tract stones in plain X-ray images.
  • A total of 1,017 patient X-ray images were analyzed using a 17-layer Residual Network, with the model achieving an F score of 0.752 and displaying high sensitivity (0.872) and positive predictive value (PPV) (0.662) during testing.
  • The results indicate that the CAD system offers quick and automatic detection of urinary tract stones, making it a potentially useful tool for primary care physicians, although further improvements in PPV are necessary.
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Objective: To develop a computer-aided diagnosis (CAD) algorithm with a deep learning architecture for detecting prostate cancer on magnetic resonance imaging (MRI) to promote global standardisation and diminish variation in the interpretation of prostate MRI.

Patients And Methods: We retrospectively reviewed data from 335 patients with a prostate-specific antigen level of <20 ng/mL who underwent MRI and extended systematic prostate biopsy with or without MRI-targeted biopsy. The data were divided into a training data set (n = 301), which was used to develop the CAD algorithm, and two evaluation data sets (n = 34).

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In this paper, a study of assistive devices with multi-modal feedback is conducted to evaluate the efficiency of haptic and auditory information towards the users' mouse operations. Haptic feedback, generated by a combination of wheels driven by motors, is provided through the use of the haptic mouse. Meanwhile, audio feedback either in the form of synthesized directional speech or audio signal.

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