Untersuchungen zur Bildqualität, Hochkontrastauflösung und Dosis am Stamm- und Gliedmaßenskelett mit einem neuen dedizierten CT-System (ISO-C-3D)

Rock, C.; Kotsianos, D.; Linsenmaier, Ulrich; Fischer, T.; Brandl, Roland; Vill, F.; Wirth, Stéfan; Kaltschmidt, R.; Euler, Ekkehard; Pfeifer, Klaus; Reiser, MF

doi:10.1055/s-2002-20107

Cited by 69 publications

(15 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Preclinical studies carried out on cadaveric specimens and on the high-contrast phantom showed sufficient image quality for the axial skeleton [21]. Although 3D image intensifiers have been used clinically for almost a decade, only a few studies are available that examine the diagnostic value of intraoperative 3D imaging in spinal surgery.…”

Section: Discussionmentioning

confidence: 99%

“…A direct comparison of the individual patient radiation dose parameters is not possible because of the total different application forms of x-radiation. Dose measurement at phantoms showed a considerable lower radiation exposure of the lumbar spine using 3D intensifier compared with a spiral CT standard procedure [21]. Berger et al confirmed the lower radiation doses using the Ziehm Vario 3D intensifier [3].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Benefit and accuracy of intraoperative 3D-imaging after pedicle screw placement: a prospective study in stabilizing thoracolumbar fractures

et al. 2009

View full text Add to dashboard Cite

Internal fixation is the established dorsal standard procedure for the treatment of thoracolumbar fractures. The main problem of the procedure is the false positioning of the pedicle screws. The exact determination of pedicle screws has up to now only been possible through postoperative computed tomography. This study was intended to clarify the diagnostic value of intraoperative 3D scans after pedicle screw implantation in thoracolumbar spine surgery. The direct intraoperative consequences of the 3D scans are reported and the results of the 3D scans are compared with the postoperative computed tomography images. Intraoperative 3D scans were prospectively carried out from June 2006 to October 2008 on 95 patients with fractures of the thoracolumbar spine that have been treated with internal fixation. Screws positions were categorised intraoperatively, screws in relevant malposition were repositioned immediately. A computed tomography of the involved spinal section was carried out postoperatively for all patients. The positions of the pedicle screws were determined and compared in the axial reconstructions of both procedures. Four hundred and fourteen pedicles with enclosed screws were evaluated by the 3D scans. The time needed for carrying out the 3D scan amounts to an average of 8.2 min. Eleven screws (2.7%) in ten patients were primarily intraoperatively repositioned on the basis of the 3D scan evaluation. Two of 95 patients had to have false positions of the screws revised secondarily following evaluation of the computed tomographies. The secondary postoperative revision rate of the patients amounts to 2.1%. In relation to the number of screws, this is a revision rate of 0.5%. The postoperative computed tomographies showed 323 pedicles without cortical penetration by the screws (78.0%). Ninety-one screws penetrated the pedicle wall (22%). It was possible to postoperatively compare the position classifications of 406 pedicle screws. The CT showed 378 correct screw positions, while 28 screws were positioned falsely. On the basis of the 3D scans, 376 of 378 correct positions were correctly assessed. Twenty-one of 28 false positions could be correctly classified. The sensitivity of all 3D scans reached 91.3% and the specificity 98.2%. The position of 97.8% of the pedicle screws was correctly recognised by the intraoperative 3D scan. Nine screws were classified falsely (2.2%). The comparison of the classification results showed significantly higher error findings by the 3D scan in the spinal section T1-10 (P = 0.014). The image quality of the 3D scan correlates significantly with the width of the scanned pedicle, with the body mass index, the scanned spinal section and the extent of the fixation assembly. 3D scans showed a high accuracy in predicting pedicle screw position. Primary false placement of screws and primary neurovascular damage cannot be avoided. But intraoperative evaluation of the 3D scans resulted in a primary revision rate of 2.7% of the pedicle screws and we could lower the secondary revis...

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Benefit and accuracy of intraoperative 3D-imaging after pedicle screw placement: a prospective study in stabilizing thoracolumbar fractures

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Similar findings were reported when a series of images of the axial skeleton and limbs were created with an ISO-C-3D fluoroscopy device. 17,18 A comparison between fpVCT or fpDVT scans of isolated temporal bone specimens and the scans of whole-head specimens revealed that the detailed resolution of the images was higher; however, with flat panel scanners, the filigree structures of temporal bone were displayed more clearly. The images of the whole-head specimen on flat panel devices were noisier.…”

Section: Figmentioning

confidence: 99%

Temporal Bone Imaging: Comparison of Flat Panel Volume CT and Multisection CT

Majdani¹,

Thews²,

Bartling³

et al. 2009

AJNR Am J Neuroradiol

View full text Add to dashboard Cite

BACKGROUND AND PURPOSE:A recent development in radiology is the use of flat panel detectors in CT to obtain higher-resolution images. This technique is known as flat panel volume CT (fpVCT). We sought to compare the image quality and diagnostic value of 2 different flat panel detector-equipped scanners: one is a prototype fpVCT scanner, and the other is a so-called flat panel digital volume tomography (fpDVT) scanner, which is routinely used in clinical setup with current state-of-the-art multisection CT (MSCT) scanners.

show abstract

“…Auch an Wirbelsäule (Pedikelschrauben) und Becken (Sakrum, Sakroiliakalgelenk, Azetabulum) ist die 3D-Bildgebung möglich und sinnvoll.Allerdings sind dazu Operationstische oder Zubehör aus röntgendurch-lässigem Material erforderlich. Die Strahlenbelastung ist für die Extremitätendarstellung vergleichbar mit der einer CT-Untersuchung, für Rumpfabschnitte etwas höher [6].Zu beachten ist die Streustrahlung [6], die während der Bildaquisition für die 3D-Rekonstruktion -im Gegensatz zur bisherigen C-BogenDurchleuchtung -durch Einhalten eines Sicherheitsabstands von 3,50 m vermieden werden kann.…”

Section: Diskussionunclassified

3D-Bildwandler?Erfahrungen zu Aufwand und Benefit

Euler

Heining

Wirth³

et al. 2004

Trauma Berufskrankh

Self Cite

View full text Add to dashboard Cite

Untersuchungen zur Bildqualität, Hochkontrastauflösung und Dosis am Stamm- und Gliedmaßenskelett mit einem neuen dedizierten CT-System (ISO-C-3D)

Abstract: Preliminary results show, that image quality of C-arm-based CT-imaging (ISO-C-3D) seems to be adequate in smaller joints. ISO-C-3D images of the hip and axial skeleton show a decreased image quality, which does not seem to be sufficient for diagnosing subtle fractures.

Cited by 69 publications

References 10 publications

Benefit and accuracy of intraoperative 3D-imaging after pedicle screw placement: a prospective study in stabilizing thoracolumbar fractures

Benefit and accuracy of intraoperative 3D-imaging after pedicle screw placement: a prospective study in stabilizing thoracolumbar fractures

Temporal Bone Imaging: Comparison of Flat Panel Volume CT and Multisection CT

3D-Bildwandler?Erfahrungen zu Aufwand und Benefit

Contact Info

Product

Resources

About