| 1. |
|
|
| 2. |
- Besjakov, Jack, et al.
(författare)
-
Reducing arrhythmogenic effects in the isolated heart enriching roentgen contrast media with electrolytes. Survey and present state
- 1995
-
Ingår i: Acta Radiologica. Supplementum. - 0365-5954. ; 399, s. 115-121
-
Tidskriftsartikel (refereegranskat)abstract
- A review of the literature on the effects of adding electrolytes to ionic as well as nonionic contrast media (CM) in the isolated heart model reveals that both ionic and nonionic CM favor from such addtion, if the added electrolytes are balanced with respect to each other. By enriching nonionic monomeric as well as dimeric CM with such a balanced electrolyte solution, the risk of ventricular fibrillation is reduced and myocardial contractibility is improved compared to nonionic CM without such enrichment. The new nonionic dimer iodixanol is slightly hypotonic to plasma in concentrations suitable for coronary arteriography. The water solution of iodixanol therefore contains an osmotic space in which electrolytes can be added, therby making it isotonic with plasma.
|
|
| 3. |
|
|
| 4. |
- Dimopoulos, P A, et al.
(författare)
-
Anatomical variations of the human vestibular aqueduct : Part II. A radioanatomical study
- 1996
-
Ingår i: Acta Radiologica, Supplement. - 0365-5954. ; 403, s. 33-41
-
Tidskriftsartikel (refereegranskat)abstract
- The human vestibular aqueducts are classified into 3 types and into the types hyper-, normo- and hypoplastic. The types correspond with each other up to over 85%. For a better understanding of the radioanatomy and for the proper interpretation of radiograms, we describe the presence of a flat recess-like widening of the peripheral portion of the aqueduct, as well as other findings.
|
|
| 5. |
- Dimopoulos, P A, et al.
(författare)
-
Anatomical variations of the human vestibular aqueduct : Part I. A radioanatomical study
- 1996
-
Ingår i: Acta Radiologica, Supplement. - 0365-5954. ; 403, s. 21-32
-
Tidskriftsartikel (refereegranskat)abstract
- Variations in the size and shape of the human vestibular aqueduct were evaluated in 118 plastic casts of unselected specimens of human temporal bones. They were examined by conventional radiography and by high resolution CT. The degree of the mastoid and perilabyrinthine pneumatization was defined and classified into 3 types. The dimensions of the peripheral portion of the aqueduct were found to be related to the extent of the perilabyrinthine pneumatization.
|
|
| 6. |
- Dimopoulos, P A, et al.
(författare)
-
Anatomical variations of the tympanic and mastoid portions of the facial nerve canal. A radioanatomical investigation
- 1996
-
Ingår i: Acta Radiologica, Supplement. - 0365-5954. ; 403, s. 49-59
-
Tidskriftsartikel (refereegranskat)abstract
- The measurement results agree with those of previous investigations. The course of the tympanic portion is S-shaped and has an impression on its upper surface. High resolution CT reproduces dehiscences of the bony canal in a percentage similar to that of microscopical methods and in relevant sites. Pneumatization does not influence the dimensions of the 2 portions.
|
|
| 7. |
- Ebeling Barbier, Charlotte, et al.
(författare)
-
Placement of a transjugular intrahepatic portosystemic shunt in addition to recanalization of acute and chronic portomesenteric vein occlusions : a retrospective evaluation
- 2020
-
Ingår i: Acta Radiologica, Supplement. - : SAGE PUBLICATIONS LTD. - 0365-5954 .- 2058-4601. ; 9:10
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Portomesenteric vein thrombosis may be life-threatening due to bowel ischemia caused by venous stasis, or variceal bleeding caused by portal hypertension. Purpose: To evaluate the effectiveness and safety of recanalization combined with transjugular intrahepatic portosystemic shunt in acute and chronic portomesenteric vein thrombosis in patients with and without liver cirrhosis. Material and Methods: 21 consecutive patients (5 women, 16 men; mean 48 years) with portomesenteric vein thrombosis (8 acute, 13 chronic) treated at the Interventional Radiology department between March 2014 and September 2018 were retrospectively reviewed. The main portal vein was completely obliterated and the portomesenteric vein thrombosis extended into the superior mesenteric vein in all patients. The portomesenteric vein thromboses were recanalized transhepatically, a transjugular intrahepatic portosystemic shunt was inserted, thrombectomy was performed in acute portomesenteric vein thrombosis, and angioplasty with or without additional stenting was performed in chronic portomesenteric vein thrombosis. Results: Recanalization was successful in 8/8 patients (100%) with acute portomesenteric vein thrombosis, and in 11/13 patients (85%) with chronic portomesenteric vein thrombosis. In 12 patients, blood flow was restored in one session. Several sessions were more frequently needed in patients with acute portomesenteric vein thrombosis compared to those with chronic portomesenteric vein thrombosis (p = 0.003). Re-occlusion occurred and was recanalized in 10/19 patients and was more frequent in patients with chronic (n = 8/11) than on those with acute (n = 2/8) portomesenteric vein thrombosis (p = 0.04). Adverse events occurred in five patients. There was no 30-day mortality. Conclusion: Recanalization and insertion of a transjugular intrahepatic portosystemic shunt is safe and effective in patients with acute and chronic portomesenteric vein thrombosis with or without cirrhosis. Recanalization was more likely to stay patent in acute compared with chronic portomesenteric vein thrombosis.
|
|
| 8. |
|
|
| 9. |
|
|
| 10. |
- Leander, Peter
(författare)
-
Liver-specific contrast media for MRI and CT experimental studies
- 1995
-
Ingår i: Acta Radiologica. Supplementum. - 0365-5954. ; 396, s. 1-36
-
Tidskriftsartikel (refereegranskat)abstract
- MRI and CT are modalities appropriate for liver imaging. To obtain higher sensitivity in diagnoses of focal lesions in the liver, contrast media (CM) are used. Non-specific extracellular CM are not optimal as they rapidly diffuse into both normal tissue and tumorous tissue. By two different mechanisms, the hepatobiliary route and targeting to the reticuloendothelial system, agents may accumulate in normal liver tissue, thereby giving liver-specific CM. So far no such agents have been approved for clinical use. In the present studies, animal models were used to investigate the imaging efficacy of experimental liver-specific CM and answer the following questions: i) Do these new liver-specific CM result in enhancement of normal liver? ii) If enhancement in normal liver is present, does this result in higher contrast of normal liver to tumorous tissue? iii) If higher contrast of normal liver to tumorous tissue is present, does this result in higher tumour detection-rates? Relative to non-enhanced and contrast-enhanced CT, what tumour detection-rate is obtained using non-enhanced and contrast-enhanced MRI? All the liver-specific CM studies possessed the ability to significantly alter the signal in normal liver tissue. Compared to precontrast values, the liver-specific CM studied in MRI (Mn-DPDP) and CT (IEEC-particles and iodixanol-liposomes) were able to increase significantly the contrast of normal liver tissue to tumorous tissue and the tumour detection-frequency in VX2-carcinoma liver tumour-bearing rabbits. In CT using a non-specific extracellular CM, iohexol, no improvement in contrast or tumour detection-frequency was obtained. As reflected in the values of contrast-to-noise obtained, MRI and CT have the same potential for tumour detection in the liver model used in the present studies. Liver-specific CM have the property of improving the contrast of normal liver tissue to tumorous tissue in MRI and CT, giving higher tumour detection-rates. Permitting intravenous administration and the use of long imaging-windows, liver-specific CM are easy to use.
|
|
