Three-dimensional display of the pelvic structure of anorectal malformations based on CT and MR images
| Autor: | Seishichi Yokoyama, Jinichi Soeda, Tomoo Tajima, Akira Hayashi, Haruo Ishida, Yasuzo Suto, Toshio Mitomi, Shigeru Ueno |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Male
medicine.medical_specialty Radiography Anal Canal Image processing Rectourethral fistula Pelvis Standard anatomical position medicine Computer Graphics Image Processing Computer-Assisted Humans Child business.industry Rectum General Medicine Magnetic Resonance Imaging Perineum medicine.anatomical_structure Urethra Pediatrics Perinatology and Child Health Personal computer Sphincter Surgery Radiology business Tomography X-Ray Computed |
| Zdroj: | Journal of pediatric surgery. 30(5) |
| ISSN: | 0022-3468 |
| Popis: | Three-dimensional images of the pelvic structure of patients with anorectal malformation (ARM) were constructed by computer graphics based on radiographic computerized tomography (CT) and magnetic resonance (MR) images. Organ contour data from CT images and raw MR image data were transferred to a personal computer and to a graphic workstation respectively. On MR image processing, organs were extracted semiautomatically by thresholding enclosed areas. After several steps of image processing, three-dimensional anatomy of each anomaly was visualized with emphasis on position and shape of the muscle complex. In control patients without an anomaly, images showed that the rectum is supported by the levator muscle from behind and descends along with the urethra. In the male patient, the anal canal separates from the urethra and penetrates through the middle of the sphincter complex to reach the orifice. In those with low-type anomaly with a fistula opening to the perineum or the vestibule, images showed the fistula descending through the anterior portion of the sphincter complex. Images of those with a rectourethral fistula could show the muscle complex behind the rectum and at the region where the external sphincter should be. In those with cloacal anomalies, anatomical position and the shape of three different viscera were easily recognized, and the muscle complex was shown like that of rectourethral-type anomalies. This study is a new approach to the anomaly to facilitate understanding it and can assist a surgeon in planning a procedure. This kind of application would make it possible for a surgeon to consider the strategy on a display screen before the real surgery. |
| Databáze: | OpenAIRE |
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