Journal of computer assisted tomography
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J Comput Assist Tomogr · Jan 2015
Comparative StudyClinical impact of 3-dimensional balanced turbo-field-echo magnetic resonance cholangiopancreatography at 3 T: prospective intraindividual comparison with 3-dimensional turbo-spin-echo magnetic resonance cholangiopancreatography.
The objective of this study was to evaluate the clinical utility of 3-dimensional (3D) balanced turbo-field-echo (BTFE) magnetic resonance cholangiopancreatography (MRCP) with gate and track acquisition at 3 T. ⋯ Three-dimensional BTFE MRCP yields significantly better image quality and visibility of large biliary structures than VISTA MRCP at a significantly shorter acquisition time. Volume isotropic T2-weighted acquisition MRCP provides detailed information on the main pancreatic duct that tends to be obscure on the 3D BTFE sequence.
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J Comput Assist Tomogr · Nov 2014
A histogram-based similarity measure for quantitative magnetic resonance imaging: application in acute mild traumatic brain injury.
The most commonly used summary metric in neuroimaging is the mean value, but this pays little attention to the shape of the data distribution and can therefore be insensitive to subtle changes that alter the data distribution. ⋯ Our results show that HSM is more sensitive than the standard mean values in detecting brain tissue changes. Future studies on brain tissue properties using quantitative magnetic resonance imaging should consider the use of HSM to properly capture any tissue changes.
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J Comput Assist Tomogr · Sep 2014
Randomized Controlled TrialRole of compressive sensing technique in dose reduction for chest computed tomography: a prospective blinded clinical study.
The purpose of this study was to assess pulmonary lesion detection, diagnostic confidence, and noise reduction in sparse-sampled (SpS) computed tomographic (CT) data of submillisievert (SubmSv) chest CT reconstructed with iterative reconstruction technique (IRT). ⋯ More than 90% dose reduction could be achieved with one-fourth sparse-sampled and SubmSv chest CT examination when reconstructed with IRT. Chest CT dose at one fourth of a millisievert with SpS is possible with optimal lesion detection and diagnostic confidence for the evaluation of pulmonary findings.
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J Comput Assist Tomogr · Sep 2014
Comparative StudyVoxel-based correlation between whole-brain CT perfusion with 320-row area detector ct and iodine 123 iodoamphetamine brain perfusion spect in patients with cerebrovascular disease.
We compared cerebral blood flow (CBF) measured using computed tomographic (CT) perfusion (CTP) and N-isopropyl-p-[(123) I]-iodoamphetamine cerebral perfusion single-photon emission computed tomography (SPECT). ⋯ Computed tomographic perfusion overestimated CBF compared with SPECT and showed poor correlation at the skull base. Computed tomographic perfusion CTP excluding high-blood-flow areas improved the correlation over the whole brain in patients with chronic cerebrovascular disease.