Biomedical subjects

L Lindsköld

Publications and source records attributed to L Lindsköld.

5 recordsLinked to original sources

PubMedDate not supplied

Positioning of temperature measurement points using multiplanar computed tomography.

A method is described for the use of computed tomography and multiplanar reconstruction to depict in single images the full course of obliquely running thermometry catheters. In 14 patients given thermoradiotherapy for locally advanced breast carcinoma, reformatted images of the full catheter course were obtained for all 98 catheters so far tested. The main clinical advantage of this time-consuming procedure was the ability to determine the localization within the catheters of individual temperature measurement points of multipoint thermistor probes. It was also possible to study the localization of the measurement points in relation to the tumour margins.

Breast Neoplasms↗

PubMedDate not supplied

Shape of retroperitoneal lymph nodes at computed tomography does not correlate to metastatic disease in early stage non-seminomatous testicular tumors.

Variety Range (difference between the maximum and minimum transverse diameters in percentage of the minimum diameter) was calculated for 86 lumbar lymph nodes with maximum diameter ranging between 5 mm and 19 mm at CT. The nodes were located within a group (pre- and paracaval, interaortico-caval, pre- and paraaortic) which was removed during primary lymphadenectomy for non-seminomatous testicular tumor. Most nodes were fairly rounded with a Variety Range less than 20%. There was no difference between the largest node in a metastasis group (Variety Range less than 20% in 29 out of 36) and tumor free nodes (Variety Range less than 20% in 39 out of 50). A rounded shape of lymph nodes measuring less than 20 mm on transverse CT sections was not a reliable sign of metastasis in patients with non-seminomatous testicular tumor.

Adolescent↗

PubMedDate not supplied

Absorbed dose resulting from a specially designed computed tomography technique for examination of the urinary bladder.

The absorbed spatial dose distribution resulting from a specially designed CT protocol for examination of the urinary bladder has been investigated with TLD rods in a body phantom containing tissue equivalent material. The CT examination consisted of scout view and both pre- and postcontrast scan series with 5 mm slice thickness and 5 mm unscanned intervals between successive scans. Cross-sectional dose distribution for one scan in the plane of the ovaries was measured as well as the dose profile for one scan along a line through the ovary parallel to the axis of rotation. Based on these measurements, the dose resulting from the whole CT examination was calculated, both with contiguous and noncontiguous scans. The ovarian dose was calculated for different positions of the ovaries in relation to the scanned area. The absorbed dose varied between 8.3 mGy and 9.7 mGy with the actual technique used. When contiguous scans with the same thickness were taken, the ovarian dose increased with a factor from 1.7 to 1.9. The dose resulting from the CT protocol of the urinary bladder was of the same magnitude as absorbed dose resulting from urography. When the diagnostic gain from a precise definition of tumor extent was taken into account, the dose resulting from the CT protocol was judged acceptable.

Female↗

PubMedDate not supplied

Computed tomography and conventional radiography in intrathoracic metastases from non-seminomatous testicular tumor.

Conventional chest radiographs and CT scans were studied retrospectively in 283 patients with untreated non-seminomatous testicular tumor. Intrathoracic metastases were found in 47 patients, and CT was the only positive examination in 20 of them. Lung metastases were seen in 39 patients and mediastinal lymph nodes were involved in 13. The additional yield of CT in detecting only at CT in 9 out of 13 cases as compared with 14 out of 39 for the lung parenchyma). Posterior mediastinal and retrocrural lymph nodes were most often enlarged, and involvement of these was most difficult to detect at conventional radiography.

Adolescent↗

PubMedDate not supplied

Computed tomography of invasive bladder carcinoma after diagnostic transurethral resection.

Fourteen patients with known muscle invasive bladder carcinoma were examined with computed tomography (CT) before and five to seven days after diagnostic transurethral resection (TUR). The CT examinations included pre- and postcontrast series. In order to standardize the technique, we examined on a distended bladder. No significant changes occurred for the whole group after TUR. Individual changes were seen. In six patients the largest measured area of the bladder tumor increased after resection and in four the largest measured thickness increased, and this should be borne in mind when CT is used to evaluate tumor response to treatment. Perivesical changes occurred only after extensive diathermy or perforation. They did not show contrast enhancement and could therefore not be mistaken for tumor growth.

Aged↗