CT-calculometry (CT-CM): advanced NCCT post-processing to investigate urinary calculi

Area of Science:

• Urology
• Radiology
• Medical Imaging

Background:

• Urinary calculi (kidney stones) pose a significant clinical challenge.
• Accurate preoperative assessment of stone characteristics is crucial for effective treatment planning.

Purpose of the Study:

• To evaluate CT-calculometry (CT-CM) as a novel method for analyzing urinary calculi.
• To determine mineralisation, composition, homogeneity, and volume using preoperative non-contrast-enhanced computed tomography (NCCT).

Main Methods:

• CT-CM was applied to preoperative NCCT scans of 25 patients with upper tract urinary calculi.
• Quantitative CT-osteoabsorptiometry (CT-OAM) determined absolute mineralisation, compared with Fourier infrared spectroscopy.
• Advanced software-based NCCT post-processing assessed homogeneity and performed 3D volumetric reconstruction.

Main Results:

• CT-CM was feasible in all 25 cases.
• Quantitative CT-OAM-derived mineralisation values showed potential for identifying common stone types.
• High levels of inhomogeneity were detected, even in stones with a single component.
• Volumetric measurements were efficiently obtained.

Conclusions:

• CT-calculometry (CT-CM) is a promising novel approach utilizing advanced NCCT post-processing.
• CT-CM accurately determines urinary calculi mineralisation, composition, homogeneity, and volume.
• This method can provide valuable information for predicting the outcomes of various stone treatment strategies.