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H G Hieckel

Publications and source records attributed to H G Hieckel.

13 recordsLinked to original sources
PubMed1992

[The place of computed tomography in the staging of bronchial carcinoma. A retrospective study].

The conventional radiological and CT findings in 347 patients with confirmed bronchial carcinomas have been compared. In 184 patients subjected to surgery, the post-operative TNM classification was compared with the pre-operative CT staging. It was found that CT staging of the T-classification was correct in 82% and of the lymph nodes in 62.5% of cases. CT had a sensitivity of 92% and 95% for the recognition of mediastinal and bronchopulmonary lymph nodes, respectively, and a specificity of 68% and 57%. In 163 patients not subjected to surgery the reasons for avoiding operation were also studied. In more than 80% of these patients it was the CT findings which had indicated that the patient was inoperable.

Adenocarcinoma↗
PubMed1992

[Magnetic resonance tomography (MRT) in pleural diseases. A comparison with CT and histopathological findings].

The MRI and CT appearances in 48 patients with histologically confirmed benign and malignant pleural abnormalities were compared retrospectively. Abnormal pleural changes were shown in 47 out of the 48 patients by high signal intensity of the pleura in T2-weighted sequences and in contrast enhanced T1-weighted sequences on MRI. CT showed abnormalities in 45 out of 48 patients. Delineation of pleural and pulmonary changes by CT was possible in 13 out of 23 cases, and pleural disease from effusions in 15 out of 28 cases. T2-weighted MRI was successful in 14 out of 23 and 4 out of 28 cases, respectively. T1-weighted images after contrast were successful in 20 out of 23 and 22 out of 28 cases, respectively. Indications of malignant pleural disease were the presence of mediastinal or circumferential involvement or involvement of the entire pleura, thickness of more than 10 mm and nodular changes. The most reliable sign of malignancy was infiltration of the thoracic wall and the diaphragm; this was better demonstrated by MRI (18 out of 19 and 2 out of 2 cases) than by CT (14 out of 19 and 0 out of 2 cases).

Adult↗
PubMed1992

[Pleural diseases in magnetic resonance tomography (MRT)].

MR images of 48 patients with histologically confirmed benign and malignant diseases of the pleura were retrospectively compared with CT and bioptically/surgically obtained findings. In 47/48 patients pathological changes of the pleura were visualized by increased signal intensities on T2-weighted and contrast enhanced T1-weighted MR images. This lead to a slightly improved sensitivity compared to CT, where pathological pleura findings were confirmed in 45/48 patients. MRI was able to identify 24/28 confirmed pleural effusions, whereas CT was successful in 26/28 patients. In two cases effusions not identified on CT were visible on T2-weighted MRI. 4 pleural effusions were missed with MRI.. On CT images differentiation of pleural changes vs effusions or adjacent lesions of lung parenchyma was successful in 20/28 and in 17/23 cases, respectively. Contrast enhanced T1-weighted images achieved the highest diagnostic accuracy with 22/28 and 20/23 cases, respectively. Signal intensities on MRI were unsuitable as sole criterion for the differentiation of benign and malignant diseases of the pleura. Contour and pattern of spreading of pleural changes were helpful in differential diagnosis. Nodular changes, thickening of more than 10 mm and mediastinal, circumferential and entire hemithoracic affection of the pleura were suggestive for malignant pleural disease. Infiltration of the diaphragm and the chest wall were most indicative for malignancy; here MRI (2/2 resp. 18/19 cases) was superior to CT (0/2 resp. 14/19 cases). CT was superior in the detection of pleural calcifications and osseous destruction.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1986

[Computed tomographic findings in extrinsic allergic alveolitis. Comparison with conventional x-ray findings].

Seventeen patients with extrinsic allergic alveolitis or bird-fancier's lung were examined by standard radiological techniques and classified after Hapke's classification. In addition, the patients were examined by CT. The CT patterns have been analysed and compared with standard radiological findings. The methodological advantages of CT are discussed. Radiological investigation is of limited value in the diagnosis of extrinsic allergic alveolitis. Conventional radiography remains the standard of initial x-ray examination. In early cases, however, CT may be a valuable addition within the diagnostic strategy of a diagnostic imaging department.

Adult↗
PubMed1983

[Value of computer tomography in the diagnosis of thoracic sarcoidosis].

The paper deals with our experience with computed tomography in thoracal sarcoidosis. This method allows a good judgement of lymph nodes in mediastinum and statements, which stand out from conventional roentgenologic diagnostic. In recording of enlarged hilar lymph nodes these methods are equal. As a rule X-ray films and conventional tomography are for planning of therapy so much evident, that in our opinion it is not necessary to use computed tomography in routine diagnostic of sarcoidosis.

Adolescent↗