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Biomedical subjects

A Heuck

Publications and source records attributed to A Heuck.

At least 73 records · Page 4Linked to original sources
PubMed1989

[Possibilities of MR tomography of diseases of the hand and wrist].

MRI studies of 63 patients with various abnormalities of the hand and wrist were analyzed. Studies were performed on scanners with a field strength of 0.35, 0.5, or 1.5 T. Imaging parameters included T1- and T2-weighted sequences in the coronal and transverse planes and contiguous slices 3-5 mm thick. In 37 patients with post-traumatic disorders, MRI revealed carpal avascular necrosis, tendon abnormalities and, in some cases, abnormalities of interosseous ligaments and the triangular fibrocartilage. In 15 patients with such inflammatory diseases as arthritis, tenosynovitis and carpal tunnel syndrome and in 11 patients with tumors, MRI provided clear delineation of osseous and soft tissue abnormalities. The current role of MRI in the diagnosis of hand and wrist abnormalities is discussed on the basis of these results.

Adolescent↗
PubMed1988

The Ehlers-Danlos syndrome, type IV, with an unusual combination of organ malformations.

A patient having type IV Ehlers-Danlos syndrome is described because of an uncommon combination of malformations. He had multiple aneurysms, a hepatic artery-to-portal vein fistula, and diverticula of the biliary passages, the sigmoid colon, and bladder. He also suffered from scoliosis and dilatation of inner and outer cerebral spinal fluid containing spaces.

Abnormalities, Multiple↗
PubMed1988

[Value of MR for the diagnosis, differential diagnosis and therapy follow-up of Perthes' disease].

59 children were examined by MR, including 31 with Perthes' disease, 7 with subluxating Perthes' disease and 12 with hip pain of unknown origin; the results were compared with conventional radiological findings. MR was superior for the early recognition and for the exact determination of the extent and localisation of juvenile femoral epiphyseal necrosis. It was also of great help in differential diagnosis. It appears to be a suitable method for judging the effect of therapy at an early stage.

Adolescent↗
PubMed1988

[Imaging of osteoid osteoma by MR tomography].

We report the demonstration of eight osteoid osteomas by means of magnetic resonance imaging (MRI). The nidus could be depicted showing intermediate signal intensity in T1-weighted and intermediate or increased signal intensity in T2-weighted sequences. It was embedded in thickened bone cortex, which demonstrated a signal-free zone. A different pattern was found in a subchondral osteoid osteoma of the talar dome, in which neither nidus nor sclerotic margin could be delineated. MRI is a valuable diagnostic tool in osteoid osteomas and may provide important information in addition to conventional imaging methods.

Adolescent↗
PubMed1987

Selective digital subtraction arteriography in necrosis of the femoral head.

Selective digital subtraction arteriographic investigations of the arteries of the femoral head in 31 patients with traumatic and 34 patients with nontraumatic femoral head necrosis (FHN) were compared with investigations in a control group of 35 patients without hip disease. In the control group and in patients with nontraumatic FHN atypical arteriographic findings were found only in one third of cases. In traumatic FHN, however, vascular alterations could be detected in 97% of cases. This evidence suggests that damage to the femoral head vessels is a major etiological factor in traumatic, but not in nontraumatic, FHN. In late arterial phases of DSA a perinecrotic hypervascularization was the common feature in all nontraumatic necroses and could be observed in 71% of traumatic necroses. Its pathophysiological mechanism is discussed.

Adolescent↗
PubMed1987

Age-related morphology of the normal pancreas on computed tomography.

Abdominal computed tomographic scans were performed on a group of 360 patients between the ages of 20 and 80 years. The anteroposterior diameter of the pancreatic head, body, and tail, the age-related ratio of vertebral body-pancreas diameter, and the external and internal contours of the organ were analyzed. The age-related changes in the pancreas were compared with known anatomical findings.

Adult↗
PubMed1987

DSA--control of implanted devices for arterial hepatic perfusion.

In contrast to conventional film angiography, the perfusion pattern of hepatic arterial chemotherapy was consistently visualized by DSA in 40 patients with implanted Infusaid pump or Port-A devices. Incomplete perfusion of a liver region by the cytotoxic agent was recognized by DSA as accurately as by nuclide scintigraphy. Furthermore, DSA appeared to be more sensitive in determining aberrantly perfused extrahepatic regions; this was especially true when there was a nonligated right hepatic artery. Specific details of vascular lesions and associated complicating events also could be satisfactorily analyzed by DSA only.

Adult↗
PubMed1987

[Imaging of femur head necrosis using MR tomography].

Magnetic resonance tomography (MR) was used to examine the femoral heads of 20 normals and of 56 patients with diseases of the femoral head, including Perthe's disease (four cases), adult necrosis of the femoral head (39 cases) and pain of unknown cause (13 cases). Femoral head necrosis and Perthe's disease regularly produce reduced signal intensity. The localisation of the areas of necrosis can be determined accurately in the coronary and sagittal plane. In 11 femoral heads, necrosis could be demonstrated unequivocally by MR in the presence of normal radiographic findings. Follow-up of nine patients with negative MR findings and indefinite symptoms confirmed the absence of necrosis.

Adult↗
PubMed1987

[MRI in osteochondrosis dissecans].

The osseous manifestations of osteochondrosis dissecans are well demonstrated by conventional and computerised tomography. Beyond that, magnetic resonance imaging (MRI) is effective in evaluating the vitality and loosening of an osseous dissecate. Subchondral cavities and cartilaginous defects are detected with high accuracy. Further, MRI seems to be a useful method in childhood to differentiate a variant irregularity of the osseous articular surface from definite osteochondrosis dissecans.

Adolescent↗
PubMed1987

[The MRT demonstration of bone marrow changes in intervertebral disk degeneration].

Amongst 214 patients with degenerative disc disease, MRT showed focal fat deposition in the vertebral marrow close to the end plate in 87 (41%). The appearances and distribution of these zones is described. Recognition of these common changes is important in differential diagnosis between inflammatory and neoplastic processes.

Bone Marrow↗
PubMed1986

[DSA of the pulmonary vessels during endobronchial laser- and afterloading therapy of malignant bronchial stenoses].

The findings are reported of the DSA examination of the pulmonary vessels in 16 patients with malignant bronchial stenoses, for whom laser or after-loading therapy was being considered. In these patients an improvement of dyspnoea can be expected only of there is adequate perfusion of the involved lung segment. DSA demonstrated stenoses or occlusions of main pulmonary or lobar arteries in six patients. Ten patients had a normal pulmonary circulation. In most cases the result of the DSA examination was important in determining treatment.

Aged↗
PubMed1986

[Selective arterial DSA of the femur head vessels].

Selective arterial DSA of the arteries of the femoral head was carried out in 39 patients. The appearances were studied in nine patients without any hip abnormality, in 13 idiopathic and eight post-traumatic cases of femoral head necrosis and in nine patients with recent fractures. In every patient the vessels were well demonstrated. In the presence of idiopathic aseptic necrosis there was always hypervascularity around the necrotic area. As in the normal controls, pathological findings were seen in the deep branch of the medial circumflex femoral artery and in the nutrient artery in one-third of patients. Post-traumatic aseptic necrosis, recent fractures and dislocations always showed abnormalities of the vessels to the femoral head. The changes in the femoral head vessels demonstrated by DSA are probably not of great significance for the development of idiopathic aseptic necrosis, however they are found regularly following trauma.

Adolescent↗