Abdominal metastases of medulloblastoma related to a ventriculoperitoneal shunt.
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Adult↗
Biomedical subjects
Aldo Morra
Publications and source records attributed to Aldo Morra.
CT-Urography.
In this paper we present an overview of CT-Urography. With the advent of multislice CT scanners and the evolution of image processing methods this technique now affords optimal urographic images comparable to those obtained with conventional techniques. We describe the acquisition techniques and protocols used by the various authors. Effective radiation dose has conditioned the use of CT-Urography so that the tendency today is to reduce the number of scans by performing, after the nonenhanced scan, a single contrast-enhanced scan comprising both the nephrographic and urographic phase. With the use of multislice CT the quality of the urogram improves with the number of slices. We illustrate a variety of processing techniques, multiplanar reconstruction (MPR), maximum (MIP) and average intensity projection (AIP) and volume rendering (VR) and present a series of upper urinary tract tumours testifying to the superiority of the AIP technique over MIP. We then review the results of comparative studies of CT-Urography with conventional urography in upper urinary tract diagnostics. Finally, we describe the advantages and limitations of CT-Urography.
Contrast Media↗
Evaluation of lingual vascular canals of the mandible with Computed Tomography.
PURPOSE: To assess the anatomy of the mandibular lingual vascular canals with the use of computed tomography (CT). MATERIALS AND METHODS: Seventy consecutive patients underwent preimplantation CT of the mandible. CT images were obtained on axial plane by using a bone reconstruction algorithm and then processed with dedicated software (Dentascan). The number of lingual vascular canals, the diameter of their entrance foramina and the distance of the foramina from the symphysis menti and from the lower edge of the mandible were measured in each patient. The median superior canal (MSC), the median inferior canal (MIC), the lateral mesial canals (LMC) and the lateral distal canals (LDC) were evaluated separately. RESULTS: 0 to 5 canals were found in each patient. The MSC was found to be present in 98.6% of cases; the mean diameter of the entrance foramen was 0.85+/-0.28 mm located adjacent the symphysis menti and 11.3+/-2.6 mm from the inferior margin of the mandible. The MIC was found to be present in 32.9% of cases; the mean diameter of the entrance foramen was 0.58+/-0.21 mm located adjacent the symphysis menti and 5.5+/-2.2 mm from the inferior margin of the mandible. LMCs were found to be present in 38.6% of cases; the mean diameter of their entrance foramina was 0.60+/-0.24 mm located 5.1+/-2.5 mm from the symphysis menti and 6.3+/-3.2 mm from the inferior margin of the mandible. LDCs were found to be present in 48.6% of the patients; the mean diameter of their entrance foramina was 0.58+/-0.19 mm located 19.3+/-7.3 mm from the symphysis menti and 6.6+/-5.4 mm from the inferior margin of mandible. CONCLUSIONS: Dental CT detects the lingual vascular canals of the mandible in a high percentage of subjects and allows a good demonstration of their number, location and entrance foramen diameter. The evaluation of these canals is important in the preoperative planning of dental implants or in the planning of dental surgery in general so as to avoid bleeding due to damage of the vessels present in these canals.
Adolescent↗
Noninvasive evaluation of a fistula between a giant coronary aneurysm and coronary sinus performed via multidetector row computed tomography.
Coronary artery fistula (CAF) is an uncommon anomaly of congenital and rarely iatrogenic etiology. Most of the patients are asymptomatic, and the anomaly is incidentally recognized during a coronary angiography performed for other reasons. Also, coronary artery aneurysms are rare. We report a case of CAF associated with a giant aneurysm evaluated using multidetector row computed tomography.
Aged↗
Abdominal recurrence of ovarian cancer: value of abdominal MR in patients with positive CA125 and negative CT.
PURPOSE: To evaluate the role of abdominal MR in the diagnosis of ovarian cancer recurrence in patients with increasing serum Ca-125 levels and negative abdomino-pelvic CT scan. MATERIALS AND METHODS: In a period of about 30 months, 22 patients in follow-up for ovarian carcinoma (stages II, III-IV) with increasing levels of Ca-125 and negative abdomino-pelvic CT scan were studied with abdomino-pelvic MR. All patients had a disease-free interval of at least 6 months after cytoreductive surgery and chemotherapy. MR examinations were performed with T1- and T2-weighted SE and FSE sequences in the axial and coronal planes, before and after Gadolinium administration. Tumour recurrence was confirmed at surgery, percutaneous biopsy and by monitoring progression or remission of the disease with clinical examination, Ca-125 serum levels and integrated imaging (CT and MR) during and after medical therapy. RESULTS: MR imaging demonstrated recurrence of the disease in 16 of the 22 patients, 3 of the remaining 6 patients were true negatives, whereas 3 patients were false negatives (in one case the CT and MR studies missed the peritoneal seeding found at surgery performed 1 month after the MR; in 2 cases both the CT and MR scans became positive for abdominal recurrence after 3 and 4 months respectively). The sensitivity and diagnostic accuracy of MRI were 84% (16/19) whereas specificity was 100% (3/3). The positive predictive value was 100% (16/16) whereas the negative predictive value was 50% (3/6). CONCLUSIONS: In a selected population of women with increasing serum Ca-125 levels and negative abdominal CT, MR imaging could supply earlier information about the presence and location of recurrences with a high impact on further decisions regarding the choice of therapeutic options (surgical or medical). The limited number of patients requires additional studies to confirm these resuts.
Abdominal Neoplasms↗