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X-ray Imaging

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...

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Updated: Jan 18, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Optimising Beam Geometry in Orthopaedic X-Rays: A Phantom Study.

Jodie Ringin¹, Zac Maibaum¹, Lucy Fox¹

¹Deakin University, Australia.

Journal of Medical Radiation Sciences

|June 4, 2025

Summary

This summary is machine-generated.

The bisecting angle technique, originally for dental radiography, shows promise for improving long bone X-rays. It significantly reduces geometric distortion, enhancing imaging accuracy when standard methods are challenging.

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Area of Science:

Radiological imaging
Orthopedic diagnostics
Medical physics

Background:

Antoni Cieszynski's bisecting angle technique minimizes geometric distortion in dental radiography.
This technique angles the X-ray tube perpendicular to the bisecting line between the object and image receptor.
Its application to long bone imaging, especially when routine positioning is difficult, remains unexplored.

Purpose of the Study:

To evaluate the effectiveness of Cieszynski's bisecting angle technique for X-ray imaging of long bones.
To quantify the reduction in geometric distortion compared to standard techniques.
To assess its potential for improving diagnostic accuracy in compromised positioning scenarios.

Main Methods:

An adult phantom forearm was used to test the bisecting angle technique.
Radiographs were taken with a straight tube (control), straight tube at increments, matching tube angle, and bisecting angle technique.
Geometric distortion was measured using a caliper tool on the resulting images.

Main Results:

The bisecting angle technique significantly reduced geometric distortion (elongation and foreshortening) compared to other methods.
Maximum measured length with the bisecting angle technique was 24.1 cm, versus >43 cm elongation and 13.5 cm foreshortening.
While not eliminating distortion, the technique markedly improved image accuracy.

Conclusions:

The bisecting angle technique is a viable method for enhancing long bone imaging accuracy.
It effectively minimizes elongation and geometric distortion in radiographic imaging.
This technique holds potential for improving clinical long bone assessments, particularly in challenging cases.