The Experts below are selected from a list of 150 Experts worldwide ranked by ideXlab platform

Yasuhiro Morimoto - One of the best experts on this subject based on the ideXlab platform.

  • Advocacy of diagnostic criteria for maxillary incisive canal cysts based on alteration of normal maxillary incisive canals according to aging in Japanese populations
    Head & Face Medicine, 2019
    Co-Authors: Naruhiko Ueda, Tatsurou Tanaka, Nao Wakasugi-sato, Shinobu Matsumoto-takeda, Yuichi Miyamura, Takaaki Jyoujima, Kouichi Kiyota, Kensuke Tsutsumi, Yasuhiro Morimoto
    Abstract:

    Background The purpose of the present study was to describe the CT imaging findings of normal incisive canals and incisive canal cysts and propose cut-off values to differentiate between them. Methods A total of 220 normal subjects and 40 patients with incisive canal cysts on multi-detector row computed tomography (MDCT) were retrospectively analyzed. The shapes, sizes, anatomic variations, Hounsfield Scale values, and so on of maxillary incisive canals and the sizes and Hounsfield Scale values of maxillary incisive canal cysts were analyzed. Results A significant difference in sizes of maxillary incisive canals in normal subjects was found between males and females. The sizes of maxillary incisive canals were significantly wider during aging, but shapes, anatomic variations, and Hounsfield Scale values in the maxillary incisive canals were not significantly different with aging. A significant difference in sizes but not Hounsfield Scale values was found between normal maxillary incisive canals and maxillary incisive canal cysts. Based on a cut-off of over 6 mm in the width of incisive canals, maxillary incisive canal cysts could not be appropriately diagnosed for subjects over 60 years of age. Over 60 years of age, maxillary incisive canal cysts could be appropriately diagnosed based on a cut-off of over 7.1 mm in width of incisive canals. When maxillary incisive canals of the hourglass types were seen on sagittal sections, significantly more patients had maxillary incisive canal cysts than other types. Conclusion In coincidentally diagnosing asymptomatic incisive canal cysts on imaging, we should apply different cut-offs for the size of the maxillary incisive canal for patients over and under 60 years of age. Specifically, the cut-offs for the long axis of maxillary incisive canal cysts were 7.1 mm for patients over 60 years of age and 6.0 mm for those under 60 years of age. In addition, we should pay attention to wider canals with hourglass shapes as indicative of cystic change of maxillary incisive canals.

  • Advocacy of diagnostic criteria for maxillary incisive canal cysts based on alteration of normal maxillary incisive canals according to aging in Japanese populations.
    Head & Face Medicine, 2019
    Co-Authors: Naruhiko Ueda, Tatsurou Tanaka, Nao Wakasugi-sato, Shinobu Matsumoto-takeda, Yuichi Miyamura, Takaaki Jyoujima, Kouichi Kiyota, Kensuke Tsutsumi, Yasuhiro Morimoto
    Abstract:

    The purpose of the present study was to describe the CT imaging findings of normal incisive canals and incisive canal cysts and propose cut-off values to differentiate between them. A total of 220 normal subjects and 40 patients with incisive canal cysts on multi-detector row computed tomography (MDCT) were retrospectively analyzed. The shapes, sizes, anatomic variations, Hounsfield Scale values, and so on of maxillary incisive canals and the sizes and Hounsfield Scale values of maxillary incisive canal cysts were analyzed. A significant difference in sizes of maxillary incisive canals in normal subjects was found between males and females. The sizes of maxillary incisive canals were significantly wider during aging, but shapes, anatomic variations, and Hounsfield Scale values in the maxillary incisive canals were not significantly different with aging. A significant difference in sizes but not Hounsfield Scale values was found between normal maxillary incisive canals and maxillary incisive canal cysts. Based on a cut-off of over 6 mm in the width of incisive canals, maxillary incisive canal cysts could not be appropriately diagnosed for subjects over 60 years of age. Over 60 years of age, maxillary incisive canal cysts could be appropriately diagnosed based on a cut-off of over 7.1 mm in width of incisive canals. When maxillary incisive canals of the hourglass types were seen on sagittal sections, significantly more patients had maxillary incisive canal cysts than other types. In coincidentally diagnosing asymptomatic incisive canal cysts on imaging, we should apply different cut-offs for the size of the maxillary incisive canal for patients over and under 60 years of age. Specifically, the cut-offs for the long axis of maxillary incisive canal cysts were 7.1 mm for patients over 60 years of age and 6.0 mm for those under 60 years of age. In addition, we should pay attention to wider canals with hourglass shapes as indicative of cystic change of maxillary incisive canals.

Borut Žalik - One of the best experts on this subject based on the ideXlab platform.

  • Lossless Compression of Threshold-Segmented Medical Images
    Journal of Medical Systems, 2012
    Co-Authors: Denis Špelic, Borut Žalik
    Abstract:

    This paper introduces a new algorithm for losslessly compressing voxel-based 3D CT medical images. Firstly, medical data is segmented according to selected ranges of the Hounsfield Scale. The data is then arranged into two data streams. The first stream identifies the positions of the remaining data after segmentation. This information is compressed by the JBIG standard. The second stream contains the exact data values and it is losslessly compressed by our algorithm. The efficiency of this approach has been evaluated by a prototype application. This approach represents an interesting alternative for the long-term storage of medical 2D and 3D images, and for applications in telemedicine. The compression method can be used either for 2D or 3D medical data.

  • Lossless Compression of Segmented CT Medical Images According to the Hounsfield Scale
    2011 International Conference on Digital Image Computing: Techniques and Applications, 2011
    Co-Authors: Denis Špelic, Domen Mongus, Borut Žalik
    Abstract:

    In this paper, a method for loss less compression of medical CT images is presented. The method allows separate compression, transmission, and decompression using data segmentation based on the Hounsfield Scale. The presented method modifies our previous method by modifying the prediction scheme. The prediction scheme omits the inter-slice prediction to allow random access into the compressed segmented CT slides. The results show that the obtained compression rate is comparable to previous method.

Naruhiko Ueda - One of the best experts on this subject based on the ideXlab platform.

  • Advocacy of diagnostic criteria for maxillary incisive canal cysts based on alteration of normal maxillary incisive canals according to aging in Japanese populations
    Head & Face Medicine, 2019
    Co-Authors: Naruhiko Ueda, Tatsurou Tanaka, Nao Wakasugi-sato, Shinobu Matsumoto-takeda, Yuichi Miyamura, Takaaki Jyoujima, Kouichi Kiyota, Kensuke Tsutsumi, Yasuhiro Morimoto
    Abstract:

    Background The purpose of the present study was to describe the CT imaging findings of normal incisive canals and incisive canal cysts and propose cut-off values to differentiate between them. Methods A total of 220 normal subjects and 40 patients with incisive canal cysts on multi-detector row computed tomography (MDCT) were retrospectively analyzed. The shapes, sizes, anatomic variations, Hounsfield Scale values, and so on of maxillary incisive canals and the sizes and Hounsfield Scale values of maxillary incisive canal cysts were analyzed. Results A significant difference in sizes of maxillary incisive canals in normal subjects was found between males and females. The sizes of maxillary incisive canals were significantly wider during aging, but shapes, anatomic variations, and Hounsfield Scale values in the maxillary incisive canals were not significantly different with aging. A significant difference in sizes but not Hounsfield Scale values was found between normal maxillary incisive canals and maxillary incisive canal cysts. Based on a cut-off of over 6 mm in the width of incisive canals, maxillary incisive canal cysts could not be appropriately diagnosed for subjects over 60 years of age. Over 60 years of age, maxillary incisive canal cysts could be appropriately diagnosed based on a cut-off of over 7.1 mm in width of incisive canals. When maxillary incisive canals of the hourglass types were seen on sagittal sections, significantly more patients had maxillary incisive canal cysts than other types. Conclusion In coincidentally diagnosing asymptomatic incisive canal cysts on imaging, we should apply different cut-offs for the size of the maxillary incisive canal for patients over and under 60 years of age. Specifically, the cut-offs for the long axis of maxillary incisive canal cysts were 7.1 mm for patients over 60 years of age and 6.0 mm for those under 60 years of age. In addition, we should pay attention to wider canals with hourglass shapes as indicative of cystic change of maxillary incisive canals.

  • Advocacy of diagnostic criteria for maxillary incisive canal cysts based on alteration of normal maxillary incisive canals according to aging in Japanese populations.
    Head & Face Medicine, 2019
    Co-Authors: Naruhiko Ueda, Tatsurou Tanaka, Nao Wakasugi-sato, Shinobu Matsumoto-takeda, Yuichi Miyamura, Takaaki Jyoujima, Kouichi Kiyota, Kensuke Tsutsumi, Yasuhiro Morimoto
    Abstract:

    The purpose of the present study was to describe the CT imaging findings of normal incisive canals and incisive canal cysts and propose cut-off values to differentiate between them. A total of 220 normal subjects and 40 patients with incisive canal cysts on multi-detector row computed tomography (MDCT) were retrospectively analyzed. The shapes, sizes, anatomic variations, Hounsfield Scale values, and so on of maxillary incisive canals and the sizes and Hounsfield Scale values of maxillary incisive canal cysts were analyzed. A significant difference in sizes of maxillary incisive canals in normal subjects was found between males and females. The sizes of maxillary incisive canals were significantly wider during aging, but shapes, anatomic variations, and Hounsfield Scale values in the maxillary incisive canals were not significantly different with aging. A significant difference in sizes but not Hounsfield Scale values was found between normal maxillary incisive canals and maxillary incisive canal cysts. Based on a cut-off of over 6 mm in the width of incisive canals, maxillary incisive canal cysts could not be appropriately diagnosed for subjects over 60 years of age. Over 60 years of age, maxillary incisive canal cysts could be appropriately diagnosed based on a cut-off of over 7.1 mm in width of incisive canals. When maxillary incisive canals of the hourglass types were seen on sagittal sections, significantly more patients had maxillary incisive canal cysts than other types. In coincidentally diagnosing asymptomatic incisive canal cysts on imaging, we should apply different cut-offs for the size of the maxillary incisive canal for patients over and under 60 years of age. Specifically, the cut-offs for the long axis of maxillary incisive canal cysts were 7.1 mm for patients over 60 years of age and 6.0 mm for those under 60 years of age. In addition, we should pay attention to wider canals with hourglass shapes as indicative of cystic change of maxillary incisive canals.

Denis Špelic - One of the best experts on this subject based on the ideXlab platform.

  • Lossless Compression of Threshold-Segmented Medical Images
    Journal of Medical Systems, 2012
    Co-Authors: Denis Špelic, Borut Žalik
    Abstract:

    This paper introduces a new algorithm for losslessly compressing voxel-based 3D CT medical images. Firstly, medical data is segmented according to selected ranges of the Hounsfield Scale. The data is then arranged into two data streams. The first stream identifies the positions of the remaining data after segmentation. This information is compressed by the JBIG standard. The second stream contains the exact data values and it is losslessly compressed by our algorithm. The efficiency of this approach has been evaluated by a prototype application. This approach represents an interesting alternative for the long-term storage of medical 2D and 3D images, and for applications in telemedicine. The compression method can be used either for 2D or 3D medical data.

  • Lossless Compression of Segmented CT Medical Images According to the Hounsfield Scale
    2011 International Conference on Digital Image Computing: Techniques and Applications, 2011
    Co-Authors: Denis Špelic, Domen Mongus, Borut Žalik
    Abstract:

    In this paper, a method for loss less compression of medical CT images is presented. The method allows separate compression, transmission, and decompression using data segmentation based on the Hounsfield Scale. The presented method modifies our previous method by modifying the prediction scheme. The prediction scheme omits the inter-slice prediction to allow random access into the compressed segmented CT slides. The results show that the obtained compression rate is comparable to previous method.

Tatsurou Tanaka - One of the best experts on this subject based on the ideXlab platform.

  • Advocacy of diagnostic criteria for maxillary incisive canal cysts based on alteration of normal maxillary incisive canals according to aging in Japanese populations
    Head & Face Medicine, 2019
    Co-Authors: Naruhiko Ueda, Tatsurou Tanaka, Nao Wakasugi-sato, Shinobu Matsumoto-takeda, Yuichi Miyamura, Takaaki Jyoujima, Kouichi Kiyota, Kensuke Tsutsumi, Yasuhiro Morimoto
    Abstract:

    Background The purpose of the present study was to describe the CT imaging findings of normal incisive canals and incisive canal cysts and propose cut-off values to differentiate between them. Methods A total of 220 normal subjects and 40 patients with incisive canal cysts on multi-detector row computed tomography (MDCT) were retrospectively analyzed. The shapes, sizes, anatomic variations, Hounsfield Scale values, and so on of maxillary incisive canals and the sizes and Hounsfield Scale values of maxillary incisive canal cysts were analyzed. Results A significant difference in sizes of maxillary incisive canals in normal subjects was found between males and females. The sizes of maxillary incisive canals were significantly wider during aging, but shapes, anatomic variations, and Hounsfield Scale values in the maxillary incisive canals were not significantly different with aging. A significant difference in sizes but not Hounsfield Scale values was found between normal maxillary incisive canals and maxillary incisive canal cysts. Based on a cut-off of over 6 mm in the width of incisive canals, maxillary incisive canal cysts could not be appropriately diagnosed for subjects over 60 years of age. Over 60 years of age, maxillary incisive canal cysts could be appropriately diagnosed based on a cut-off of over 7.1 mm in width of incisive canals. When maxillary incisive canals of the hourglass types were seen on sagittal sections, significantly more patients had maxillary incisive canal cysts than other types. Conclusion In coincidentally diagnosing asymptomatic incisive canal cysts on imaging, we should apply different cut-offs for the size of the maxillary incisive canal for patients over and under 60 years of age. Specifically, the cut-offs for the long axis of maxillary incisive canal cysts were 7.1 mm for patients over 60 years of age and 6.0 mm for those under 60 years of age. In addition, we should pay attention to wider canals with hourglass shapes as indicative of cystic change of maxillary incisive canals.

  • Advocacy of diagnostic criteria for maxillary incisive canal cysts based on alteration of normal maxillary incisive canals according to aging in Japanese populations.
    Head & Face Medicine, 2019
    Co-Authors: Naruhiko Ueda, Tatsurou Tanaka, Nao Wakasugi-sato, Shinobu Matsumoto-takeda, Yuichi Miyamura, Takaaki Jyoujima, Kouichi Kiyota, Kensuke Tsutsumi, Yasuhiro Morimoto
    Abstract:

    The purpose of the present study was to describe the CT imaging findings of normal incisive canals and incisive canal cysts and propose cut-off values to differentiate between them. A total of 220 normal subjects and 40 patients with incisive canal cysts on multi-detector row computed tomography (MDCT) were retrospectively analyzed. The shapes, sizes, anatomic variations, Hounsfield Scale values, and so on of maxillary incisive canals and the sizes and Hounsfield Scale values of maxillary incisive canal cysts were analyzed. A significant difference in sizes of maxillary incisive canals in normal subjects was found between males and females. The sizes of maxillary incisive canals were significantly wider during aging, but shapes, anatomic variations, and Hounsfield Scale values in the maxillary incisive canals were not significantly different with aging. A significant difference in sizes but not Hounsfield Scale values was found between normal maxillary incisive canals and maxillary incisive canal cysts. Based on a cut-off of over 6 mm in the width of incisive canals, maxillary incisive canal cysts could not be appropriately diagnosed for subjects over 60 years of age. Over 60 years of age, maxillary incisive canal cysts could be appropriately diagnosed based on a cut-off of over 7.1 mm in width of incisive canals. When maxillary incisive canals of the hourglass types were seen on sagittal sections, significantly more patients had maxillary incisive canal cysts than other types. In coincidentally diagnosing asymptomatic incisive canal cysts on imaging, we should apply different cut-offs for the size of the maxillary incisive canal for patients over and under 60 years of age. Specifically, the cut-offs for the long axis of maxillary incisive canal cysts were 7.1 mm for patients over 60 years of age and 6.0 mm for those under 60 years of age. In addition, we should pay attention to wider canals with hourglass shapes as indicative of cystic change of maxillary incisive canals.