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Biomedical subjects

F Aspestrand

Publications and source records attributed to F Aspestrand.

At least 19 recordsLinked to original sources
PubMed1992

Imaging temporomandibular joint abnormalities in patients with rheumatic disease. Comparison with surgical observations.

The preoperative examination findings in the soft tissue and bone of 22 temporomandibular joints of 15 patients with rheumatic disease were compared with the diagnosis after TMJ surgery. Agreement was found in 15 joints with rheumatic involvement and in 4 with internal derangement. In 5 (with unsuccessful arthrotomography) of the 15 rheumatic joints, magnetic resonance imaging showed destruction of disks with soft-tissue replacement, corresponding to fibrous tissue/ankylosis observed at surgery. Bony fusions in 2 of these joints were depicted with computed tomography. In the remaining 10 joints, arthrotomography showed irregularly outlined small compartments corresponding to synovial proliferations observed during surgery. Similar arthrotomographic interpretation, however, was made in 2 of 3 temporomandibular joints with imaging-surgery disagreement; surgery showed fibrous adhesions. In the third joint with unsuccessful arthrotomography, magnetic resonance imaging showed internal derangement but no synovial proliferations that were surgically observed. As experienced with other joints, synovial proliferations (or fibrous adhesions) could not be depicted with magnetic resonance imaging. Thus, differentiation between internal derangement with and without rheumatic involvement could be impossible with both arthrotomography and unenhanced magnetic resonance imaging.

Adolescent↗
PubMed1992

Temporomandibular joint abnormalities associated with rheumatic disease: comparison between MR imaging and arthrotomography.

Nonenhanced magnetic resonance (MR) images and arthrotomograms of temporomandibular joints (TMJs) were compared in 18 patients with rheumatic disease. Of 22 symptomatic TMJs, arthrotomography was unsuccessful in three (14%). MR imaging showed extensive rheumatic abnormalities in two of these three joints and internal derangement in one. In another three joints (14%), both imaging modalities showed normal findings or internal derangement. In the remaining 16 joints (72%), arthrotomographic findings were interpreted as rheumatic, whereas MR findings were interpreted as rheumatic in 14 joints and as internal derangement in two. Surgical correlation in 11 joints indicated superiority of MR imaging for assessment of moderate and severe rheumatic TMJ involvement. MR imaging seemed to be of limited value in early diagnosis due to its inability to show synovial proliferation. Indirect signs of synovial proliferation could be shown with arthrotomography, which may be helpful in early diagnosis of rheumatic TMJ disease.

Adolescent↗
PubMed1992

Rheumatic and nonrheumatic disease in the temporomandibular joint: gadolinium-enhanced MR imaging.

Magnetic resonance (MR) imaging of 36 temporomandibular joints (TMJs) in 27 patients and six healthy volunteers was performed before and after injection of gadopentetate dimeglumine. Twelve asymptomatic joints were used as controls, 12 TMJs had symptomatic internal derangement, and 12 TMJs had rheumatic inflammatory disease. A small or moderate joint effusion was seen in one asymptomatic joint, four joints with internal derangement, and one joint with rheumatic involvement; in all of these, contrast enhancement of the effusion was observed. A large effusion in one rheumatic joint was enhanced only after delayed imaging. In healthy controls and patients with internal derangement, no or only minimal enhancement of intraarticular tissues was seen. Eleven of the 12 rheumatic TMJs showed moderate or intense soft-tissue enhancement along the disk and articular surfaces (ie, in areas normally devoid of synovial membrane). The one rheumatic joint without enhancement had bony ankylosis and no remaining soft tissue within the joint space. Gadolinium-enhanced MR imaging of the TMJ may effectively depict the proliferating synovium of rheumatic inflammatory joint disease.

Adolescent↗
PubMed1992

CT and MR imaging of primary tumors of the masticator space.

A retrospective study of CT and MR examinations in 14 patients with benign and malignant tumors originating in the masticator space is presented. At presentation, 12 patients revealed tumor extension to adjacent regions and spaces. Perineural tumor spread along trigeminal nerve branches to the cavernous sinus and orbits was combined with facial pain, and/or numbness, ophthalmoplegia, and exophthalmus. Detailed analysis of tumor growth and spread, enhancement and signal features at CT and MR imaging indicated the tumor histology was, with a few exceptions, nonspecific. More extensive growth and bone destruction was noted only among malignant tumors. MR imaging was found superior to CT in delineating tumor extension due to better soft tissue contrast resolution and multiplanar imaging. Posttreatment examinations were available in 11 patients and showed long-standing regional edema of the adjacent temporal lobe and masticator muscles in 4 out of 5 patients without clinical evidence of tumor. In 6 patients, CT and MR features were found almost unchanged with only small size differences after various forms of treatment.

Adolescent↗
PubMed1992

CT compared to angiography for staging of tumors of the pancreatic head.

A retrospective study of 32 patients with malignant tumor of the pancreatic head and ampullary region is presented. The aim of the study was to compare the ability of CT and angiography to evaluate the peripancreatic vessels, and to correlate the results of tumor staging based upon CT criteria to angiographic and surgical findings. In 5 patients (16%) CT disclosed contiguous tumor growth around vessels not discernible at angiography and, in contradiction to previous reports, angiography added no valuable information regarding main vessel involvement. In terms of sensitivity, specificity, and positive predictive value CT was more accurate in predicting unresectable than resectable tumors, the former with a sensitivity of 92% and a specificity and positive predictive value of 100%.

Adult↗
PubMed1992

CT and angiography in chronic liver disease.

Detailed correlation of CT and angiographic findings in a retrospective analysis of 25 cases of portal hypertension is presented. The largest diameters of the common and proper hepatic arteries, the portal, splenic, and superior mesenteric veins, and perigastric veins were measured by the two methods, including a CT control series of 20 subjects. The splenic transverse diameter was also measured. Portosystemic collaterals and concomitant pathology disclosed by the two methods were compared. A ratio of nearly 1 was found between vessel diameters measured by angiography and CT, and about 1.3 for splenic size, applying uncorrected measures from angiographic films and a vernier caliper on CT studies. The diameters of hepatic arteries, splenic, and superior mesenteric veins and spleens were significantly larger than those of controls. Except for demonstrating arterial details and esophageal varices, CT was found equal or superior to angiography in mapping portosystemic collaterals, and to disclose concomitant pathology.

Adult↗
PubMed1991

Rheumatic disease of temporomandibular joint with development of anterior disk displacement as revealed by magnetic resonance imaging. A case report.

A 34-year-old woman with known rheumatic disease (psoriatic arthritis) in joints other than the temporomandibular joint (TMJ) developed condylar posterosuperior destruction and anterior disk displacement of the right symptomatic TMJ during a 7-month period, as revealed by magnetic resonance imaging. A theory is proposed that destruction of the posterior attachment by pannus was the main reason for the disk displacement, although the pannus formation itself could not be depicted. Follow-up studies also indicated the potential of magnetic resonance imaging to demonstrate fluctuation of inflammatory changes in the TMJ.

Adult↗
PubMed1991

High resolution CT and bronchography in the assessment of bronchiectasis.

To elucidate the reliability of CT in the assessment of bronchiectasis, a retrospective study of high resolution CT and bronchography was carried out. A segment by segment comparison of 259 segmental bronchi from 70 lobes of 27 lungs in 19 patients was performed using bronchography as standard. CT was positive in 87 of 89 segmental bronchi with bronchiectasis giving a false-negative rate of 2%. CT was negative in 169 of 170 segmental bronchi without bronchiectasis at bronchography, giving a false-positive rate of 1%. There was agreement between the two modalities in identifying the different types of bronchiectasis.

Adult↗
PubMed1991

Perivascular low attenuation zone at CT of liver transplants. A follow-up study.

A follow-up study of 30 liver transplant patients confirmed that periportal and pericaval rims of low attenuation found at CT reflect hepatic lymph stasis. The perivascular rims are found coexistent with acute allograft rejection, but are not correlated with acute rejection, immunosuppressive agents (cyclosporin A), or intercurrent infection. Disappearance of the perivascular low attenuation zone in our material coincided with normalization of liver biochemistry probably associated with reestablishment of lymphatic drainage. Like previous reports on experimental hepatic lymph stasis, our study thus indicates that lymph stasis may have harmful effects on human liver allografts.

Adolescent↗
PubMed1990

Rheumatic disease of the temporomandibular joint: MR imaging and tomographic manifestations.

Thirty-six temporomandibular joints (TMJs) in 28 symptomatic patients (aged 14-40 years) with rheumatic disease (mostly rheumatoid arthritis) were studied with magnetic resonance (MR) imaging and hypocycloidal tomography. MR images of four TMJs were normal. Another four TMJs showed internal derangement. Of the 28 TMJs presumed to show rheumatic disease involvement (26 with condylar destruction or deformation), 23 showed abnormal disk structure--five showing severe disk destruction and 18 showing less severe abnormalities (inhomogeneous structure, fragmentation, poor delineation, and severe flattening). MR images showed bone abnormalities in 27 of the 36 TMJs, and tomography showed abnormalities in 25 of the 36 TMJs. Good agreement between the two imaging modalities regarding surface irregularities was found. However, MR imaging demonstrated more extensive bone abnormalities than did tomography in 11 TMJs. The potential of MR imaging for depicting bone and soft-tissue abnormalities associated with rheumatic TMJ involvement was clearly demonstrated.

Adolescent↗
PubMed1989

Focal changes of the spleen in one case of Gaucher disease--assessed by ultrasonography, CT, MRI and angiography.

Focal lesions of the spleen in one case of Gaucher disease are demonstrated by ultrasonography, CT, MRI and angiography. The sonographic and angiographic features differ from the findings presented in previous reports. The Gaucher manifestations in the spleen as demonstrated by CT, do not seem to have been reported previously. An earlier report on the MR findings in the liver and spleen in this disease did not disclose any focal abnormalities. In this case, ultrasonography and MRI revealed a targetlike configuration of the focal lesions. An attempt is made to analyze the more complex patterns disclosed by MRI against the background of the manifestations by the other imaging modalities and previous reports.

Angiography↗
PubMed1989

Radiological examination of the nasal cavity.

The complex anatomy of the interior of the nose presents a challenge in radiological imaging. Several radiologic modalities applied in the assessment of anomalies and pathologic changes in the nasal cavity are presented, illustrated by reference to various cases. The excellent ability of computed tomography to reveal valuable information concerning both benign and malignant lesions is emphasized. Magnetic resonance imaging has further extended the possibilities in diagnosis because of its high soft-tissue contrast resolution and multiplanar imaging capabilities.

Choanal Atresia↗
PubMed1988

Radiological appearance of the ampulla of Vater.

The localized dilatation below the confluence of the bile and pancreatic ducts is known as the ampulla of Vater. The purpose of the present study was to delineate the radiological features of the choledochopancreaticoduodenal junction, with special reference to ampullar formation in this region. This was done by specimen radiography and review of the films from 255 examinations with endoscopic retrograde cholangiopancreatography. Full evaluation was possible in 200 cases. Ampullar dilatation was observed in only 9 (5.1%) of the 175 patients with a common terminal opening. No ampullar dilatation was observed in the 25 patients with separate openings of the duct. The appearance in the presence of ampullar dilatation is described. The distal end of the common bile duct, below its confluence with Wirsung's duct, has been known as the ampulla of Vater for nearly 130 years. This is a most important diminutive region of the human body, but there is little in the literature concerning its radiological presentation. In this report a radiological study is presented on the choledochopancreaticoduodenal junction.

Adolescent↗
PubMed1987

Calcifications of the palatine tonsillary region: CT demonstration.

The scans of 100 consecutive patients referred for computed tomographic examinations that included the oropharynx were reviewed with regard to calcifications of the palatine tonsillary region. Calcifications were found in 20% of the female patients and 13% of the male patients. Ten patients had one calculus, and six had two or more. The sizes of the calculi ranged from 1 to 7 mm. Tonsillary calculi must be included among the diagnostic possibilities when survey radiographs of the neck show soft-tissue calcifications.

Adolescent↗
PubMed1986

The early manifestation of Yersinia colitis demonstrated by the double-contrast barium enema.

A 19-year old female with a bloody, diarrheal illness of acute onset where Crohn's disease primarily was suspected is presented. The double - contrast barium enema revealed multiple, diffusely scattered aphthous erosions of the colonic mucosa: the rectum was scarcely affected. Biopsies taken by endoscopy demonstrated nonspecific inflammatory changes of the mucous membrane. However, routinely taken stool cultures revealed an infectious colitis due to Yersinia enterocolitica. Our case demonstrates the necessity to consider Yersinia enterocolitis in the radiographic differential diagnosis when the diagnosis of Crohn's disease or ulcerative colitis seems obvious.

Adult↗
PubMed1986

Carcinoid infiltration and fibroplastic changes of the mesentery as a cause of malabsorption.

The presentation of carcinoid involvement of the mesentery is described, with clinical manifestation of severe malabsorption: angiographically it resembled retractile mesenteritis. The special biologic activity of the carcinoid cells inducing fibroblastic activity with secondary alterations of vascular, lymphatic and neural structures of the mesentery is discussed in relation to the altered physiology and morphology of the intestine, causing the clinical picture of sprue.

Aged↗