AIDR 3D
AIDR 3D is the abbreviation of Adaptive Iterative Dose Reduction 3D and is an advanced iterative reconstruction algorithm that reduces noise in both the three dimensional reconstruction data and raw data domains.

AIDR 3D - Iterative Reconstruction Schema

With the integration of AIDR 3D into SUREExposure controls, radiation exposure is automatically reduced before the scan, ensuring that the lowest possible dose is employed for the specific diagnostic objective irrespective of the size or shape of the patient.
AIDR 3D integrated in SUREExposure 3D Adaptive can be applied to all acquisition modes for routine clinical use and is able to remove up to 50% of image noise resulting, which corresponds to a dose reduction of up to 75% by the same Standard Deviation (SD) for noise.

Clinical results show that AIDR 3D substantially reduces noise, while preserving sharp details, providing “natural looking” images. As well this new technology is especially good in artifact suppression (streaks, beam-hardening, etc.). Reconstruction performed with AIDR 3D permits substantial dose reduction when compared to scans performed with traditional Filtered Back Projection (FBP) techniques. The AIDR 3D algorithm is designed to work in both the raw data and reconstruction domains and optimizes image quality for each particular body region.

AIDR 3D (right) was applied to a low dose kidney perfusion protocol: 100 kV, 25 mAs, 16 cm z-coverage, producing an effective dose of 9 mSv (k-factor = 0.015
mGy*cm*mSv-1). Images courtesy of Keio University, Japan.

Key features of AIDR 3D:

Full integration in scan protocols for improved workflow
Dose reduction in clinical setting by up to 75%
Minimal penalty in reconstruction times
Noise reduction and improved Spatial Resolution
Superb artifact suppression

Quantum Denoising Software
Quantum Denoising Software (QDS) is a powerful tool Toshiba has developed to remove noise in reconstructed images. QDS is an adaptive noise reduction algorithm that selectively smoothes out areas of uniform density while preserving the edge information within the image, thus reducing noise while increasing the signal to noise ratio and improving image quality.
QDS works in both two and three dimensions and routinely reduces patient dose (prospectively) by up to 50% while maintaining both low and high contrast resolution.

400 mAs 200 mAs 100 mAs 50 mAs

Active Collimator
In conventional scanners, helical scanning is hampered by “over-ranging” resulting in extra radiation dose at the beginning and at the end of a helical scan. The Active Collimator eliminates X-rays that are not used for image reconstruction in helical scanning. The Collimator operates automatically at the start and end of scan range limiting the extend of the X-Ray beam, permitting further dose reduction. Toshiba’s Active Collimator eliminates over-ranging reducing the patient dose by up to 20%.

SUREExposureTM 3D
SUREExposure 3D is a function that continuously modulates the exposure dose in the X, Y and Z directions according to the patient's body shape. SUREExposure 3D is based on the user-specified level of image quality and the automatic attenuation measurements obtained from the patient scanogram, the tube current (mA) is automatically adjusted in the X, Y and Z planes to maintain image quality at a consistent level. As a result, SUREExposure 3D alone can achieve a dose reduction of up to 40% depending on the individual patient and the anatomy to be scanned. SUREExposure 3D Adaptive automatically adjusts the SD value per slice based on the amount of fat detected in the scanogram

Boost3DTM
Streak artifacts may occur when scanning areas with high attenuation, such as the shoulder and/or pelvis area, using a low dose protocol.

Without Boost3D Starvation correction With Boost3D

Boost3D is a three-dimensional data processing technology that automatically detects these areas. Subsequently it eliminates these streak artifacts by reducing the photon starvation effects in the raw data domain. As a result image quality is improved in all viewing planes. Dose saving up to 30%.

AIDR 3D, QDS, Active Collimator, SUREExposure 3D & Boost3D play an important role in reducing patient dose. A comprehensive training program ensures that operators become proficient in taking advantage of all the dose reduction technologies available for every scan, providing clinicians with maximum image quality at the lowest possible dose to the patient.