Strahlenexposition bei der Mehrschicht-Spiral-CT (MSCT) von Kopf, Mittelgesicht und Beckenskelett: Vergleich mit dem Einzeilen-Spiral-CT (SSCT)

Wedegärtner, U.; Thurmann, H.; Schmidt, Rachael; Adam, Gerhard

doi:10.1055/s-2003-37242

Cited by 10 publications

(2 citation statements)

References 4 publications

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“…Multiplanar reconstruction (MPR) with slice thickness between 2 and 4 mm allows us to describe the fracture in detail [5,6,14]. The nationwide survey of the German Roentgen Society (1999) for CT exposition shows a relative high radiation exposure with CT examination of the pelvic bones [7]. Because there are radiation sensitive organs especially in the pelvis and also in view of the frequent young patients, reduction in radiation exposure is desirable.…”

Section: Introductionmentioning

confidence: 99%

Multislice CT of the pelvis: dose reduction with regard to image quality using 16-row CT

et al. 2005

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To optimize examination protocols of 16-row multi-detector CT (MDCT) of pelvis for dose reduction with regard to image quality. MDCT of pelvis was performed on 12 cadaver specimens with stepwise reduction of tube current from 160 mA (113, 80, 56, 40, 28) to 20 mA at 120 kV. Scan parameters were 16 x 1.5 mm collimation. Reconstructions of axial and coronal images were used for evaluation of cortex, trabeculum, image quality, image noise, acetabulum and iliosacral (ISJ) joints. After data were blinded, evaluation of images was done by three radiologists according to 5-point Likert scale. Accuracy of the observers in sorting films according to dose reduction was determined with kappa coefficient. Mean values of image evaluation were determined. Pronounced deterioration of image quality for all criteria was observed between 80 and 28 mA. Adequate image quality was obtained at 40 mA [effective dose (E): 2.2 mSv, CTDI(w): 2.8 mGy] for criterion detailed definition of acetabulum and ISJ and at 80 mA (E: 4.4 mSv, CTDI(w): 5.6 mGy) for remaining criteria. Moderate agreement was observed between the three observers (kappa coefficient: 0.31). All observers were excellent in arranging images according to decreasing dose. Using 16-row MDCT image quality of pelvis is acceptable at 80 mA and 120 kV. This translates into a dose reduction of 33% of average value of the nationwide survey of the German Roentgen Society (1999) for this type of examination.

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Section: Introductionmentioning

confidence: 99%

Multislice CT of the pelvis: dose reduction with regard to image quality using 16-row CT

et al. 2005

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“…Den Prozess, diese Balance zwischen Bildqualität und Dosis zu gewährleisten, nennt man Optimierung [27,28]. Im Langzeitverlauf konnte durch Optimierung der Bildqualität entsprechend geforderten ALARA-Kriterien in der klinischen Routine eine Reduktion der Gesamtdosis von 45 und 18 % für Koronarangiographie und PTCA erzielt werden [23].…”

Section: Introductionunclassified

Durchleuchtungszeit - Ein überschätzter Parameter der Patientendosis in der invasiven Kardiologie

Kuon¹,

Robinson

Empen

et al. 2005

Rofo Fortschr Geb Rontgenstr N

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Moderne Diagnostik des Bauchtraumas

Nast-Kolb

Bail

Taeger³

2005

Chirurg

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In case of suspected intra-abdominal injury, fast transport of the patient to a suitable hospital is of high priority. The initial clinical examination aims at identifying patients with potentially life-threatening bleeding that require emergency surgery. In patients with penetrating trauma, laparoscopy is favoured to exclude suspected perforation of the peritoneum. If a peritoneal perforation is identified, exploratory laparotomy is recommended to exclude or treat lacerations of the hollow viscus. Although clinical examination should be performed its sensitivity and specificity of up to 82% and 45%, respectively, are not sufficient as the sole screening method. For the further diagnostic workup, diagnostic peritoneal lavage has been completely replaced by abdominal ultrasound examination in Germany and many other countries. Focussing not only on the detection of free abdominal fluid but also searching for parenchymal organ lesions and performing repeated examinations increases accuracy up to 96%, with specificity of 99.8% and sensitivity of 72.1%. Computed abdominal tomography with a helical scanner with and without intravenous contrast media is currently the gold standard of imaging techniques to identify traumatic abdominal injuries. A sensitivity of 97.2% and specificity of 94.7% can be achieved. False negative findings must be expected with hollow organ injuries. Serial clinical and ultrasound examinations as well as lab testing in conjunction with repeated CT may help to identify such lesions. Increased intra-abdominal pressure (IAP) with consecutive abdominal compartment syndrome and multiple organ dysfunction is a delayed complication from conditions such as severe intra-abdominal bleeding, major bleeding from pelvic ring fractures, and profuse fluid resuscitation. The IAP should be measured routinely in patients at risk, and decompression laparotomy may be indicated with pressures of higher than 20 mmHg.

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Strahlenexposition bei der Mehrschicht-Spiral-CT (MSCT) von Kopf, Mittelgesicht und Beckenskelett: Vergleich mit dem Einzeilen-Spiral-CT (SSCT)

Cited by 10 publications

References 4 publications

Multislice CT of the pelvis: dose reduction with regard to image quality using 16-row CT

Multislice CT of the pelvis: dose reduction with regard to image quality using 16-row CT

Durchleuchtungszeit - Ein überschätzter Parameter der Patientendosis in der invasiven Kardiologie

Moderne Diagnostik des Bauchtraumas

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