[Non-ionic contrast medium (iopamidol) for esophagography in risk patients].
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Administration, Oral↗
Biomedical subjects
M Georgi
Publications and source records attributed to M Georgi.
[Functional and morphological changes in the stomach in irradiation of the para-aortic region].
Six assays were conducted in order to determine some functional and morphological parameters of the gastric mucosa in patients who underwent Co60 irradiations of the para-aortic area. Slight as well as marked morphological alterations were observed whereas the functional alterations were found to be marked in all cases. Basal gastric secretion and serum gastrin level showed a continuous reduction, however, in case of severe gastritis the stimulated secretion was increased. A possible correlation with increased tissue histamine levels is discussed.
Aorta, Abdominal↗
[Improved synthesis of the highly active cholecystokinin sequence succinyl Tyr (OSO3-)-Met-Gly-Trp-Asp-Phe-NH2].
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Animals↗
[Demonstration and localization of hemorrhage in the intestinal tract. Comparison between 99mTc-colloid scintigraphy and selective angiography of the visceral vessels].
In 17 patients with suspected bleeding in the lower intestinal tract 23 scintigraphic studies were performed with Tc-colloid, followed in each case by visceral-artery angiography. Comparison of the two methods with the final clinical diagnosis indicated that angiography was correct in 6 of 23 examinations (26%), scintigraphy in 12 of 23 (52%). All scintigraphically negative results were negative also angiographically. Noninvasive, relatively unstressful scintigraphy should be performed for immediate diagnosis in any case of acute bleeding. Emergency-type angiography is reasonably performed only if scintigraphy is positive.
Adult↗
[Value of phlebo-scintigraphy for clarifying thromboembolic processes in the pelvis and legs].
In 64 patients suspected of having had pulmonary emboli due to thrombo-embolic disease, radionuclide venography (RNV) and contrast phlebography were carried out (84 examinations of extremities, 64 examinations of extremities and pelvis). Phleboscintigraphy proved informative in the thigh and in the pelvis. Around the knee, RNV was sufficiently accurate as a screening method. In the calf, RNV was of diagnostic value only in the presence of positive findings on scintigraphy.
Humans↗
[Intra-arterial DSA of the pelvic/leg vasculature using a 57 cm image intensifier].
100 consecutive intraarterial DSA's of the lower extremities obtained with a 57 cm image intensifier were evaluated retrospectively by 2 radiologists and 3 surgeons. The studies were considered diagnostic in 95% of the cases. The results, advantages and possible disadvantages are presented and compared to those associated with conventional film angiography and with i.v. DSA.
Angiography↗
Changes of serum complement concentrations in tumour patients prior and after radiotherapy.
Peripheral blood concentrations of leucocytes, platelets and complement factors Clq, C3c, C3d, C4 and C5 were examined in 30 patients suffering from malignant tumours prior and after radiotherapy. In general, a decrease of blood cell concentrations as well as serum complement levels was noted using regression analysis. Two groups were formed: patients with (group I) and without (group II) foregoing tumour surgery. A positive correlation was found for all complement factors prior therapy in group I, whereas only some complement components did correlate in group II. The results in group I are in agreement with complements classical pathway activation. We conclude that the alternative pathways influence is responsible for the different results in group II.
Combined Modality Therapy↗
Computer processed fluoroscopic images for digital intravenous renal angiography.
We investigated intravenous digital angiography using computer processed fluoroscopic images. Computer processed fluoroscopy (CPF) was compared to conventional digital subtraction angiography (DSA) in 39 patients referred for renal vessel evaluation. For assessment of CPF the anterior-posterior images were compared with the corresponding digital subtraction angiograms. 79% percent of DSA and 71% of CPF studies were diagnostic. Peripheral injection of contrast medium caused deterioration of CPF images. Skin dose measurements were obtained in 24 patients. The median dose for DSA was 8.2 rad, compared to 1.1 rad for CPF. It is concluded that sophisticated algorithms should be investigated for digital angiography, so that high image quality can be achieved with a reduced radiation exposure.
Adult↗
[Digital image intensifier radiography: imaging qualities and initial use in the gastrointestinal area].
We determined the quality of digital radiographs delivered by a large image intensifier (diameter 54 cm) and by a conventional fluoroscopic unit with a 33 cm image intensifier, and compared them to that of 100 mm spot films obtained from the same units. A special image processor was available allowing 25 images/s using a 512/512 matrix or 7.5 images/s with a 1024 X 1024 matrix. The spatial resolution of digital radiographs was well below that of the spot films, while no difference was found in contrast resolution. Images of colon specimens and gastrointestinal studies demonstrate that digital radiography does not imply a loss in diagnostic information inspite of the lower spatial resolution. Gastrointestinal studies using digital radiographs will reduce the amount of irradiation exposure of the patient and could represent an additional use for an existing equipment for DSA.
Colon↗
[1 year's experience with a 57-cm image intensifier in a universal roentgen work station].
3342 patients were examined by means of a 57 cm image intensifier during one year. The installation permits examination with the patient standing or lying. The resolution was measured with a lead grid under conditions resembling actual practice and were found to be similar to those obtained with angiographic equipment. Using a medium format technique for examining the gut and vascular system resulted in radiographic quality which was not significantly different from the use of a large format technique. For examination of the skeleton, radiographic quality, using the intensifier, was markedly poorer than that resulting from Bucky examinations. There was no diagnostic difference when carrying out lymphograms. The large intensifier window of 53 cm was particularly advantageous for DSA of the pelvic and lower limb vessels when compared with smaller intensifiers. Possible savings of film and contrast medium costs are discussed.
Adult↗
[Possibility of erroneous diagnosis with digital subtraction angiography and its causes].
In digital subtraction angiography (DSA) motion artifacts, artifacts due to overshoot, high contrast enhancement, and long exposure time may result in erroneous evaluation of the vessels. Examples are given to demonstrate and analyse the causes of possible misdiagnoses.
Angiography↗
[2 cases of primary sclerosing cholangitis--the ERCP documentation of a 3-year course of immunosuppressive therapy].
X-ray characteristics of two cases of primary sclerosing cholangitis are described. A discussion of clinical, immunological and histological features of the disease and the 3-years progress of a 40 year old man during treatment with immunesuppressive therapy (Imurek at the beginning with cortison) is shown. The stop of the progression of the disease is supposed.
Adult↗
[Results of transvenous digital subtraction angiography with a 57 cm image intensifier in circulatory disorders of the lower extremities].
The size of conventional image intensifiers is a limiting factor in performing transvenous digital subtraction angiography of the lower extremities. The results of transvenous digital subtraction angiography using a 57 cm image intensifier on 205 patients with vasoocclusive disease of the legs are presented. Two exposed fields sufficed in most cases for demonstration of all arteries, from the aortic bifurcation to the trifurcation at the lower leg. The principal advantages were the reduction of the contrast medium volume and the decrease in examination time. The reduced resolving power was a limiting factor in evaluating discrete wall lesions and of small vessels, but this did not induce diagnostic difficulties. The studies were evaluated retrospectively by an experienced vascular surgeon and in 85% of the cases were considered to be of diagnostic value.
Adult↗
[Effect of desaminoocta-pancreozymin on the locomotor activity of rats].
The influence of desaminoocta-pancreozymin (DAO-PZ) was investigated in high and low activity periods by intraperitoneal or intranasal application. DAO-PZ is a CCK-8 derivative in which the N-terminal amino acid (Asp) is exchanged for succinyl acid. A decreasing long lasting effect for 3 to 4 h was always observed in locomotor activity. A food reduction was also proved after i. p. and intranasal application. The effects correspond to those of CCK-8 reported in the literature. They are discussed in this respect.
Animals↗
[Preoperative and intraoperative use of imaging procedures in a patient with insulinoma].
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Adenoma, Islet Cell↗
[Value of sonography, computed tomography and angiography in adrenal diagnosis].
Between 1979 and 1982, 47 patients with pathological process of the adrenals were surgically treated after preceding thorough non-evasive angiographic diagnosis (6 phaeochromocytomas, 20 adrenal adenomas, 8 adrenal hyperplasias, 5 adrenal carcinomas, 5 adrenal cysts and 3 adrenal metastases). The most consistently accurate results were obtained via adrenal phlebography with an accuracy of 94%. This was followed by non-evasive computed tomography (87%). Compared with the data given in literature, hormone determination in the adrenal venous blood was less favourable (79%). Selective adrenal arteriography, which was used less often, yielded correct results in 83% of the cases, whereas the number of accurate diagnoses achieved via sonography was lowest with 54%.
Adenoma↗
Digital subtraction angiography in the preoperative evaluation of patients with a renal tumor.
Inguinal intravenous digital subtraction angiography (DSA) was performed in 14 patients referred for preoperative evaluation of a renal tumor previously diagnosed by CT and ultrasound. Conventional cavography and aortography were used as reference methods for comparison. Both DSA and conventional angiography were carried out following selective arterial injection to the abnormal kidney. The diagnostic value of DSA in examination of the inferior vena cava was generally comparable to that of conventional cavography. Intravenous aortography was unsuccessful in 2 patients due to motion artifacts. In all other patients, the information provided by DSA regarding the aorta, renal arteries and renal veins was similar to that of conventional aortography. Intrarenal vascular detail, however, was far superior on conventional films and was only useful with DSA when intra-arterial injection was implemented. In one of the 12 diagnostic examinations, localization of the renal mass could not be established by intravenous DSA, but was possible in all others. The inguinal approach advocated permits simultaneous inferior vena cavography and intravenous aortography with one single injection of contrast medium; the method is less traumatic than aortography , and does not require hospitalization of the patient. DSA may also be of value in those cases still requiring selective catheterization of the renal arteries, i.e. for angiotherapy . Intra-arterial DSA then allows reduction of the amount of contrast medium and a rapid processing of the images without detriment to the quality of the examination.
Aged↗