Qualitätssicherung im stereotaktischen Raum

Mack, Andreas; Mack, G.; Weltz, Dirk; Hönes, Andreas; Jess, A.; Wowra, Berndt; Czempiel, H; Heck, B.; Kreiner, Hans-Jürg; Seifert, Volker; Böttcher, H.D.

doi:10.1007/s00066-003-1068-2

Cited by 6 publications

(2 citation statements)

References 32 publications

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“…Therefore, the imaging modalities used must be checked and prior to starting patient treatments the geometrical uncertainty of the imaging modalities must be known. This uncertainty (mean and max in millimetres) must be checked routinely, especially after service and repair interruptions [8][9][10] .…”

Section: Din 6875-1 -Imaging Accuracymentioning

confidence: 99%

“…In order to check distortions in CT and MR images, a cylindrical phantom consisting of 145 rods, each 10 mm apart, was mounted in the stereotactic frame in such a way that the central rod coincided with a defi ned stereotactic coordinate (x = 100 mm, y = 100 mm) in axial planes [9] . The phantom was imaged with the same imaging protocols used for patients ( fi g. 2 a, b).…”

Section: Imaging Accuracy and Geometrical Functional Performance Charmentioning

confidence: 99%

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Quality Assurance in Stereotactic Radiosurgery/Radiotherapy according to DIN 6875-1

Mack¹,

Mack

Scheib

et al. 2004

Stereotact Funct Neurosurg

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The new DIN (‘Deutsche Industrie-Norm’) 6875-1, which is currently being finalised, deals with quality assurance (QA) criteria and tests methods for linear accelerator and Gamma Knife stereotactic radiosurgery/radiotherapy including treatment planning, stereotactic frame and stereotactic imaging and a system test to check the whole chain of uncertainties. Our existing QA program, based on dedicated phantoms and test procedures, has been refined to fulfill the demands of this new DIN. The radiological and mechanical isocentre corresponded within 0.2 mm and the measured 50% isodose lines were in agreement with the calculated ones within less than 0.5 mm. The measured absorbed dose was within 3%. The resultant output factors measured for the 14-, 8- and 4-mm collimator helmet were 0.9870 ± 0.0086, 0.9578 ± 0.0057 and 0.8741 ± 0.0202, respectively. For 170 consecutive tests, the mean geometrical accuracy was 0.48 ± 0.23 mm. Besides QA phantoms and analysis software developed in-house, the use of commercially available tools facilitated the QA according to the DIN 6875-1 with which our results complied.

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Section: Din 6875-1 -Imaging Accuracymentioning

confidence: 99%

Section: Imaging Accuracy and Geometrical Functional Performance Charmentioning

confidence: 99%