The objective of this work was to evaluate the feasibility of a two-compartment distributed-parameter (DP) tracer kinetic model to generate functional images of several physiologic parameters from dynamic contrast-enhanced CT data obtained of patients with extracranial head and neck tumors and to compa...
Axial head CT without contrast showing bilateral SDHs with calcification giving an appearance of an armored brain (double skull)doi:10.1590/0004-282X20130131Farrukh S. ChaudhryJose BillerChristopher M. LoftusJohn A. Braca IiiArq. Neuro-Psiquiatr....
Objective:To compare the diagnostic accuracy of positron emission tomography/computed tomography(PET/CT)with contrast enhanced CT(CECT)alone in the initial evaluation of cervical lymph node of patients with head and neck cancer.Methods:Fifteen consecutive patients diagnosed with a head and neck cancer ...
Purpose: The purpose of this study was to objectively compare lesion detection performance of head CT images reconstructed using filtered back projection (FBP) algorithms with those reconstructed using NBC. Method: The observer study was conducted using the 2-AFC methodology. An AFC experiment consists...
The second stage (Stage 2) carries out lesion detection, and we build convolutional neural networks (CNNs) together with a classification head to distinguish the subtle texture change of lesions in non-contrast CT. We tune the Stage 2 model to achieve a specificity of 99% for lesion ...
Head-to-head comparison between 18 F-FDG PET/low-dose CT and 18 F-FDG PET/contrast-enhanced CT in relapsing ovarian carcinoma: a systematic review and meta... Head-to-head comparison between 18 F-FDG PET/low-dose CT and 18 F-FDG PET/contrast-enhanced CT in relapsing ovarian carcinoma:...
For each head CT image, we measured detection of low contrast mass lesions using a 2 Alternate Forced Choice (2-AFC) experimental paradigm. In an AFC experiment, an observer identifies the lesion location in one of two regions of interest. After performing 128 sequential observations, it is ...
2.DYER T, CHAWDA S, ALKILANI R, et al. Validation of an artificial intelligence solution for acute triage and rule-out normal of non-contrast CT head scans[J]. Neuroradiology, 2022, 64(4):735-743. 3.LAL N R,...
To examine the added diagnostic value of emergent contrast enhanced CT head (CECTH) in patients who present to the emergency department (ED) with acute non-traumatic symptoms referable to the brain, and to assess the financial implications of CECTH in the emergent setting.We queried healthcare ...
CE-CT images were obtained at 3 mm slice thickness and a minimal in-plane resolution of 1 × 1 mm2 (Brilliance, Philips Medical Systems, Best, The Netherlands), with a delay time of 120 s after intravenous contrast agent injection (Ultravist, 80 ml, 3 ml/s) [11]. Delay time ...