PMID: 12772982May 30, 2003Paper

Removal of arterial wall calcifications in CT angiography by local subtraction

Medical Physics
M van StratenC A Grimbergen

Abstract

CT Angiography (CTA) is an established technique for the minimally invasive imaging of arteries. The technique of maximum intensity projection (MIP) is often used to get a comprehensive overview of the vascular anatomy. On a MIP, however, arterial wall calcifications may hinder the visualization of the arterial lumen. These calcifications are in direct contact with the contrast-enhanced blood, which makes removal difficult. We present a local subtraction method for the automatic removal of these calcifications. In our approach a second CT scan has to be made, prior to contrast injection. The calcifications in both scans are registered prior to subtraction to compensate for displacements in between the two scans. Local subtraction results are compared with results obtained by thresholding. The method was tested in a phantom and with data from four patients. The phantom represented an artery with different types of stenosis. Data were used from patients for which CTA of the renal arteries was performed. For two patients the electrocardiogram (ECG) was recorded during the CTA examination, making retrospective cardiac gated reconstructions possible. Both the phantom and the patient study showed that the local subtraction method is ...Continue Reading

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Citations

Sep 21, 2007·European Radiology·Marc C J M KockM G Myriam Hunink
Oct 7, 2008·Investigative Radiology·Michael M LellPablo Villablanca
Nov 17, 2004·Medical Physics·Marcel van StratenCornelis A Grimbergen
Jul 6, 2014·Medical Physics·Rieneke van den BoomMathias Prokop
Sep 20, 2005·European Radiology·Hugo A F Gratama van AndelRik Stokking
Aug 7, 2014·European Radiology·Lawrence Chia Wei OhMinh Huynh
Oct 20, 2006·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Michael M LellBernd F Tomandl
Sep 15, 2005·Medical Engineering & Physics·B J B M WoltersF N van de Vosse
Nov 17, 2004·Medical Physics·Marcel van StratenCornelis A Grimbergen
May 22, 2019·The British Journal of Radiology·Lawrence Chia-Wei OhMinh Huynh

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