Comparison of Imaging Quality Between Spectral Photon Counting Computed Tomography (SPCCT) and Dual Energy Computed Tomography (DECT)

Summary

This pilot study wants to determine to which extent SPCCT allows obtaining images with improved quality and diagnostic confidence when compared to standard Dual Energy CT (DECT), both with and without contrast agent injection.

Depending on the anatomical structures/organs to be visualized during CT examinations, different scanning protocols are performed with quite variable ionizing radiation doses. Therefore, in order to obtain the most extensive and representative results of the improvement in image quality between SPCCT and DECT that will be performed CT imaging on several body regions and structures, including diabetic foot, diabetic calcium coronary scoring, adrenal glands, coronary arteries, lung parenchyma, kidney stones, inner ear, brain and joints, earl/temporal bone, colorectal carcinosis.

Conditions

• Diabetic Foot Ulcer
• Coronary Artery Disease
• Parenchymatous; Pneumonia
• Kidney Stone
• Inner Ear Disease
• Brain Stroke
• Joint Diseases
• Diabetes
• Adrenal Incidentaloma
• Hyperaldosteronism
• Macroadenoma
• Interstitial Lung Disease
• Intracranial Arteriovenous Malformations

Interventions

DEVICE

Spectral Photon Counting Computed Tomography (SPCCT)

For the dual-layer spectral CT scanner (IQon®, Philips, Amsterdam, The Netherlands), the following parameters will be used for the acquisition: * Tube potential 120 kVp; * Tube current time product of 150 mAs; * Gantry revolution time 0.33 s; * Automatic exposure control (angular and longitudinal) combined xyz-axis; * Beam collimation geometry 64 x 0.625 mm - scan field-of-view - 22 cm;

DEVICE

DECT (Dual Energy CT)

The SPCCT scanner is a prototype spectral photon-counting computed tomography system derived from a modified clinical CT system with a field-of-view (FOV) of 168 mm in-plane, and a z-coverage of 20 mm. It is equipped with energy-sensitive photon-counting detectors relying on the direct conversion high band gap semiconductor of cadmium zinc telluride (CZT). The electronics comprises 5 rate counters with 5 different configurable energy thresholds. The SPCCT scanner has the following parameters: * Base platform : iCT scanner * Tube Voltage (kVp) : 120, capability for imaging at 80 and 100 kVp * Tube current (mA) : 10 - 300 * Spatial Resolution : \> 30 lp/cm, ≤ 250 µm * Z-coverage isocenter (mm) : 20 mm * FOV (mm) : 500 * Minimum rotation time : 0.33 s/rotation * Acquisition modes : Axial, Helical, Step \& Shoot

Sponsors & Collaborators

• Hospices Civils de Lyon

  lead OTHER

Principal Investigators

• Philippe DOUEK, Pr · Service de Radiologie, l'Hôpital Louis Pradel - Hospices Civils de Lyon

Study Design

Allocation

NA

Purpose

DIAGNOSTIC

Masking

NONE

Model

SINGLE_GROUP

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2021-01-29

Primary Completion

2026-01-29

Completion

2026-01-29

Countries

• France

Study Locations