Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Videos

Computer simulation study of Siemens star x-ray image artifacts

S R Amtey, R K Tyson

Medical Physics

|January 1, 1977

Summary

This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Adaptive optics and ground-to-space laser communications.

Applied optics·2010

Same author

Using the deformable mirror as a spatial filter: application to circular beams.

Applied optics·2010

Same author

Conversion of Zernike aberration coefficients to Seidel and higher-order power-series aberration coefficients.

Optics letters·2009

Same author

Microelectromechanical system programmable aberration generator for adaptive optics.

Applied optics·2008

Same author

The systemic effect of cancers on human sera proton NMR relaxation times.

Magnetic resonance imaging·1984

Same author

Enhanced T1 differentiation between normal and dystrophic muscles.

Magnetic resonance imaging·1984

Same journal

Correction to "On the shape of the radiation survival curve in tumor spheroids: The role of oxygen heterogeneity".

Medical physics·2026

Same journal

Multi-view constrained semi-supervised vertebra detection for 3D ultrasound spine volume.

Medical physics·2026

Same journal

Accuracy of quantitative <sup>177</sup>Lu SPECT/CT imaging: A systematic review.

Medical physics·2026

Same journal

Physics-constrained dual-domain network for CBCT reconstruction from orthogonal X-rays in gynecologic radiotherapy.

Medical physics·2026

Same journal

Decomposition-based harmonization for quantitative PET imaging across scanners and radiotracers.

Medical physics·2026

Same journal

Development and evaluation of an in vivo dose-based monitoring system for electron FLASH radiation therapy.

Medical physics·2026

See all related articles

Determining focal spot size using Siemens star images is challenging due to artifacts. Computer simulations revealed that triplet splitting reliably indicates the disappearance frequency, improving focal spot measurement accuracy.

Area of Science:

Medical Imaging
Radiological Physics

Background:

Accurate focal spot size measurement is crucial for image quality in diagnostic radiology.
The Siemens star test is a common method for focal spot evaluation.
Artifacts in Siemens star images complicate the determination of the disappearance frequency.

Purpose of the Study:

To investigate the origin of artifacts in Siemens star images.
To identify reliable indicators for determining the disappearance frequency.
To improve the accuracy of focal spot size measurements.

Main Methods:

Digital computer simulation of Siemens star images.
Manipulation of simulated images using various modulation and phase transfer functions.
Analysis of image artifacts and spoke behavior.

Related Experiment Videos

Main Results:

Spoke bending in Siemens star images is not caused by zero contrast.
Exact triplet splitting occurs exclusively at the disappearance frequency.
Simulations clarified the relationship between image artifacts and frequency determination.

Conclusions:

Triplet splitting is a definitive indicator for the disappearance frequency.
Understanding artifact origins enhances the reliability of focal spot size measurements.
Computer simulation is a valuable tool for analyzing imaging artifacts.