Mar 23, 2023 · Aliasing artifact, otherwise known as undersampling, in CT refers to an error in the accuracy proponent of analog to digital converter (ADC) during image digitization.

Apr 23, 2025 · CT artifacts are common and can occur for various reasons. Knowledge of these artifacts is important because they can mimic pathology (e.g. partial volume artifact) or can degrade image …

Increasing the field of view, changing the gradient axes relative to the patient, or use of surface coils can reduce aliasing and are parameters which are controlled by the radiologist/technologist.

May 20, 2025 · Aliasing on MRI, also known as wrap-around artifact, is a frequently encountered MRI artifact that occurs when the field of view (FOV) is smaller than the body part being imaged.

Because of the lack of perfect homogeneity of the main magnetic field from one side of the body to the other, aliasing of one side of the body to the other results in the superimposition of signals of different …

Sep 14, 2024 · Artifacts are caused by a variety of factors that may be patient-related, such as voluntary and physiologic motion, metallic implants or foreign bodies. Finite sampling, k-space encoding, and …

Nov 26, 2019 · Aliasing artifact, otherwise known as undersampling, in CT refers to an error in the accuracy proponent of analog to digital converter (ADC) during image digitization.

This case shows axial T2-weighted images of the brain that demonstrate aliasing. The first image shows wrap-around with the back of the head projected over the front because the phase-encoded direction …

Jun 3, 2025 · CT scanners must often be calibrated with vendor-specific phantoms to overcome unavoidable beam hardening artifacts such as cupping. Streak artifacts can sometimes be effectively …

Mar 23, 2023 · In CT imaging, the windmill artifact is an image distortion in the axial plane, encountered during helical multidetector acquisitions. The telltale appearance is characterized by equally …