Evaluation of Sine Spin flat detector CT imaging compared with multidetector CT

Abstract

BackgroundFlat detector computed tomography (FDCT) is widely used for periprocedural imaging in the angiography suite. Sine Spin FDCT (SFDCT) is the latest generation of cone beam CT using a double oblique trajectory for image acquisition to reduce artefacts and improve soft tissue brain imaging. This study compared the effective dose, image quality and diagnostic performance of the latest generation of SFDCT with multidetector CT (MDCT).MethodsAn anthropomorphic phantom equipped with MOSFET detectors was used to measure the effective dose of the new 7sDCT Sine Spin protocol on a latest generation biplane angiographic C-arm system. Diagnostic performance was evaluated on periprocedurally acquired SFDCT for depiction of anatomical details, detection of hemorrhage, and ischemia and was compared with preprocedurally acquired MDCT. Inter- and intra-rater correlation as well as sensitivity and specificity were calculated.ResultsBoth modalities showed equal diagnostic performance in the supratentorial ventricular system. SFDCT provided inferior image quality in grey-white matter differentiation and infratentorial structures. Intraventricular, subarachnoid and parenchymal hemorrhages were diagnosed with a sensitivity of 83.3%, 84.2% and 75% and a specificity of 97.3%, 80.0% and 100%, respectively; early ischemic lesions with a sensitivity of 73.3% and specificity 94.7%. The effective dose measured for the 7sDCT Sine Spin protocol was 2 mSv.ConclusionsOur findings confirm the high diagnostic sensitivity and specificity of SFDCT in detecting intracranial hemorrhage and early ischemic lesions. The delineation of grey-white matter differentiation and infratentorial structures remains a limiting factor. In comparison to previous studies, the new 7sDCT Sine Spin protocol showed a lower effective dose.

Principles, techniques and applications of high resolution cone beam CT angiography in the neuroangio suite

“…7 The resulting series of images is backprojected to produce a volumetric dataset. 8 9 Newer machines, destined to soon become the standard, use acquisition obtained with alternative techniques compared with the traditional circular one, named sine spin 10 or dual-axis butterfly 11 Manufacturers offer different CBCT acquisition protocols that are targeted and optimized for certain clinical tasks. The acquisition protocols can differ in several basic parameters such as beam kVp, focal spot size, maximum X-ray pulse length, number of frames acquired per degree of rotation, dose per frame, number of pixels acting as detection unit, field of view (FOV), and presence of a 'mask' or background image.…”

“…The role of HR-CBCT in dural arteriovenous fistula (dAVF) has been demonstrated already in multiple articles and it is currently used by many groups. 19 20 One obvious reason to prefer CBCT to 3D-DSA is to understand the angioarchitecture of the fistula in more detail, namely the vessels supplying it and adjacent dangerous anastomoses (figures [10][11]. A careful evaluation of the images provided may lead to identification of the venous pouch which can be superselected as a venous target.…”

“…The resulting series of images is back-projected to produce a volumetric dataset 8 9. Newer machines, destined to soon become the standard, use acquisition obtained with alternative techniques compared with the traditional circular one, named sine spin10 or dual-axis butterfly11…”

Priorities for Advancements in Neuroimaging in the Diagnostic Workup of Acute Stroke

“…83 Another study that compared the latest CBCT technology with NCCT showed that early ischemic lesions were detected with a sensitivity of 73.3% and specificity of 94.7%, when compared with NCCT. 84 Further refinements in the x ray tube trajectory to include caudal and cranial angulations have decreased artifacts. 85 Novel motion correction algorithms to improve imaging quality and diagnostic assessment of the brain parenchyma have been implemented.…”

Evaluation of Radiation Exposure and Influential Factors in Cone-Beam Computed Tomography (CBCT) of the Head and Abdomen during Interventional Procedures

“…While previous studies have explored the role of CBCT in interventional procedures [ 3 , 6 , 10 ], there has been limited research specifically focusing on the radiation dose associated with CBCT image acquisition. Some studies have employed phantoms to estimate the dose of CBCT, but the corresponding results have shown significant variations due to the different methodologies used for estimating the effective dose (ED) [ 12 , 13 , 14 , 15 , 16 , 17 ]. Direct measurement of ED may be affected by differences in phantom size or material.…”