X-ray-induced acoustic computed tomography: 3D X-ray absorption imaging from a single view.

Area of Science:

• Medical Imaging
• Biophysics
• Acoustic Imaging

Background:

• Computed tomography (CT) relies on numerous X-ray projections, increasing radiation dose.
• Current CT technology requires bulky mechanical scanning systems.

Purpose of the Study:

• Introduce X-ray-induced acoustic computed tomography (XACT) for 3D X-ray imaging.
• Demonstrate XACT's potential to reduce radiation exposure and enable gantry-free imaging.

Main Methods:

• Utilizing radiation-induced acoustic waves generated by X-rays.
• Employing ultrasound detectors to capture acoustic waves for image reconstruction.
• Performing 3D numerical reconstructions and experimental validations.

Main Results:

• Achieved 0.4 mm resolution in the XZ plane and 3.5 mm in the XY plane at 16 mm depth.
• Successfully reconstructed 3D images of a human breast from a single X-ray projection.
• Experimentally determined 3D structures of objects at varying depths.

Conclusions:

• XACT enables 3D X-ray imaging from a single projection, significantly reducing radiation dose.
• The technology holds promise for biomedical applications and non-destructive testing.
• XACT offers a potential alternative to conventional CT scanners.