Journal of computer assisted tomography
-
J Comput Assist Tomogr · Sep 2015
Comparative StudyComparison of Free-Breathing With Navigator-Triggered Technique in Diffusion Weighted Imaging for Evaluation of Small Hepatocellular Carcinoma: Effect on Image Quality and Intravoxel Incoherent Motion Parameters.
To evaluate the effect on image quality and intravoxel incoherent motion (IVIM) parameters of small hepatocellular carcinoma (HCC) from choice of either free-breathing (FB) or navigator-triggered (NT) diffusion-weighted (DW) imaging. ⋯ The NT DW imaging technique offers no advantage in IVIM parameters measurements of small HCC except better image quality, whereas FB technique offers greater confidence in fitted diffusion parameters for matched acquisition periods.
-
J Comput Assist Tomogr · Sep 2015
Evaluation of Acute Abdominal Pain in the Emergency Setting Using Computed Tomography Without Oral Contrast in Patients With Body Mass Index Greater Than 25.
To evaluate the rate of delayed or missed diagnoses and need for additional computed tomography (CT) imaging in emergency department patients with abdominal pain who are imaged without oral contrast. ⋯ In patients with body mass index greater than 25 presenting to the ED with acute abdominal pain, CT examinations can be acquired without oral contrast without compromising the clinical efficacy of CT.
-
J Comput Assist Tomogr · Jul 2015
Comparative StudyUltralow-Dose Abdominal Computed Tomography: Comparison of 2 Iterative Reconstruction Techniques in a Prospective Clinical Study.
To assess lesion detection and image quality of ultralow-dose (ULD) abdominal computed tomography (CT) reconstructed with filtered back projection (FBP) and 2 iterative reconstruction techniques: hybrid-based iDose, and image-based SafeCT. ⋯ Preliminary results show that ULD abdominal CT reconstructed with iterative reconstruction techniques is achievable in smaller patients (BMI ≤ 25 kg/m) but remains a challenge for overweight to obese patients. Lesion detection is similar in full-dose SD FBP and ULD iDose/SafeCT images, with suboptimal visibility of low-contrast lesions in ULD images.
-
J Comput Assist Tomogr · Jul 2015
Additional Diagnostic Value of Inversion Recovery Single-Shot Fast-Spin Echo Sequence in Differentiation Between Hepatic Hemangiomas and Cysts.
The aim of this study was to evaluate the additional diagnostic value of "inversion recovery" single-shot fast-spin echo (IR-SSFSE) sequence using the inversion time at the null point for hepatic hemangiomas as a supplement to standard T2-weighted (T2W) magnetic resonance imaging for the distinction of hemangiomas and cysts. ⋯ Inversion recovery single-shot fast-spin echo sequence using the inversion time to null signal from the hepatic hemangiomas as a supplement to standard T2W images is useful for distinguishing hemangiomas from hepatic cysts without the need for intravenous gadolinium chelate administration.
-
J Comput Assist Tomogr · Jul 2015
320-Row Multidetector Computed Tomographic Angiogram in the Evaluation of Cerebral Vasospasm After Aneurysmal Subarachnoid Hemorrhage: A Pilot Study.
To objectively assess the accuracy of 320-row multidetector computed tomographic (CT) angiography to diagnose cerebral vasospasm after a subarachnoid hemorrhage using a new quantitative method. ⋯ A quantitative approach can be used to objectively evaluate the ability of multidetector CT angiography to assess arterial diameter in patients with clinical symptoms of postsubarachnoid hemorrhage cerebral vasospasm. This pilot study also suggests that CT angiography may overestimate the degree of cerebral vasospasm in the anterior circulation.