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  • 1
    ISSN: 1432-1084
    Keywords: CT ; CT, spine ; 3D CT ; Three-dimensional, spine ; Trauma spine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To assess the value of three-dimensional (3D) image reconstructions of two-dimensional (2D) data from contiguous non-overlapping slices in the diagnosis of spinal trauma, 21 patients with a total of 36 injured vertebrae and 4 normal controls were examined. Forty plain films in two planes, 40 axial CT scans with multiplanar reformatted (MPR) 2D reconstructions and 40 sets of 3D images (surface rendering technique) were independently evaluated by four readers. The final diagnosis was defined after a panel review of clinical, surgical and imaging findings on all modalities. The 3D image reconstructions were not as accurate as axial CT with MPR 2D reconstructions in the diagnosis of vertebral body (n = 20) and posterior element fractures (n = 35). Dislocation (n = 3) was equally well detected by all imaging modalities. Narrowing of the spinal canal (n = 17) was best assessed by either MPR 2D CT or 3D images. A rotational component was diagnosed more accurately by 3D images, followed by 2D CT and plain films. Thus, 3D images combined with MPR 2D CT reconstructions are an important adjunct for an accurate diagnosis of spinal trauma, especially when a rotational component is suspected.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 374 (1989), S. 164-168 
    ISSN: 1435-2451
    Keywords: Rectal carcinoma ; Preoperative staging ; Computed tomography ; Endorectal ultrasound
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einer prospektiven Studie wurde bei 49 Patienten mit Rectumcarcinom die Korrelation des prä and postoperativen Stagings mit der endorectalen Sonographie (ES) mit der der CT unter Berüchtigung des Tumorstadiums nach TNM verglichen. Mit CT korrelierten die prä-und postoperativen Stadien in T1 bei 9/10, in T2 bei 10/16, in T3 bei 13/15 and in T4 bei 6/8 Patienten. Nach ES fanden sich prä- und postoperativ übereinstimmende Befunde in allen T1, in 10/12 T2, in 17/20 T3 und in 6/7 T4 Stadien. Insgesamt korre lierte das prä- und postoperative Staging nach CT bei 38 and nach ES bei 43/49 Patienten. Das Tumorstadium wurde mit beiden Methoden präoperativ fast gleich häuftg überschätzt: 5ma1 nach CT und 4mal nach ES. Eine Unterschätzung des Stadiums erfolgte häufiger nach CT in 5 Fällen gegenüber 2 nach ES. (CT: Richtigkeit 77,5%, Sensitivität 88,3%, Spezifitat 94,4%; ES: Richtigkeit 87,7%, Sensitivitat 91,5%, Spezifitat 97,8%). Diagnostische Kriterien werden diskutiert. In frühen Tumorstadien läßt sich die Infiltrationstiefe mit der ES besser beurteilen als mit CT. Bei fortgeschrittenen Tumoren geben beide Methoden wichtige Informationen für die Planung der chirurgischen Therapie.
    Notes: Summary In a prospective study in 49 patients with rectal carcinoma the correlation of pre- and postoperative staging by CT and endorectal ultrasound-(EU) was compared according to TNM-classification. With CT the pre/postoperative results correlated in T1 in 9/10, in T2 in 10/16, in T3 in 13/15 and in T4 in 6/8 patients. By EU identical results were found in all T1, in 10/12 T2, in 17/20 T3 and in 6/7 T4 stages. Overall, pre- and postoperative identical results were found by CT in 38 and by EU in 43/49 patients. Overestimation of the tumor stage was similar with both methods: 5 by CT and 4 by EU. Underestimation of the stage was more often by CT in 5 than by EU in 2 cases. (CT: accuracy 77.5%, sensitivity 88.3%, specificity 94.4%; ES: accuracy 87.7% sensitivity 91.5%, specificity 97.8%). Criteria for interpretation are discussed. In early tumor stages the depth of tumor invasion can be better evaluated by EU. In late stages both methods give important information for surgical strategy.
    Type of Medium: Electronic Resource
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