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Updated: Jun 13, 2026

High Resolution 3D Imaging of Ex-Vivo Biological Samples by Micro CT

High Resolution 3D Imaging of Ex-Vivo Biological Samples by Micro CT

Published on: June 21, 2011

Image quality and radiation exposure in 320-row temporal bone computed tomography.

H C Bauknecht¹, E Siebert, A Dannenberg

¹Department of Neuroradiology, Chariteplatz 1, Berlin, Germany. christian.bauknecht@charite.de

Dento Maxillo Facial Radiology

|April 17, 2010

Summary

The 320-row CT scanner provides comparable temporal bone (tb) image quality to the 16-row CT scanner, while reducing radiation exposure by one sixth. Image noise is not significantly impacted, ensuring diagnostic efficacy.

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Area of Science:

Radiology
Medical Imaging
Computed Tomography

Background:

Advancements in CT technology aim to improve diagnostic capabilities while minimizing patient radiation dose.
Temporal bone CT imaging is crucial for diagnosing various pathologies affecting the ear and surrounding structures.

Purpose of the Study:

To compare image quality and radiation exposure between 320-row and 16-row CT scanners for temporal bone imaging.
To evaluate the diagnostic performance of newer CT technology in a clinical setting.

Main Methods:

A cadaveric head phantom underwent repeated temporal bone CT scans using both 320-row and 16-row scanners.
Image quality was assessed qualitatively by radiologists and quantitatively by measuring image noise (D(SD)).
Radiation exposure was quantified by measuring effective dose (ED) and lens organ dose (OD).

Main Results:

320-row CT demonstrated equivalent image quality to 16-row CT for standard acquisition parameters (SAP).
Image noise differences were primarily attributed to distinct reconstruction kernels used for each scanner.
Radiation exposure was reduced by approximately one sixth with the 320-row scanner (0.30 mSv ED, 8.4 mGy lens dose) compared to the 16-row scanner (0.36 mSv ED, 10.0 mGy lens dose).

Conclusions:

320-row CT provides equivalent image quality for temporal bone imaging compared to 16-row CT.
The 320-row scanner offers a significant reduction in radiation exposure, making it a safer imaging option.
The observed increase in image noise with 320-row CT is negligible and does not compromise diagnostic image quality.