Superior Specificity in Cardiac CT

Coronary CT angiography (cCTA) is gaining more and more acceptance as a non-invasive test for symptomatic patients with a low to intermediate risk of coronary artery disease. Despite its strengths in ruling out CAD, cCTA has its limitations. Its specificity may be undermined in certain conditions, such as reduced image quality due to blooming or motion artifacts. Siemens has taken up the challenge and has introduced a powerful set of features to reduce false positive findings and boost specificity in cardiac imaging.

Features & Benefits

Calcified lesions can cause blooming artifacts that hinder a reliable assessment of the vessel lumen.
Motion artifacts caused by non-optimal scan protocols and inferior imaging techniques may lead to an overestimation of the degree of stenosis. Thus, false positive findings may be introduced that can cause unnecessary further testing or treatment.

Siemens has continuously introduced a powerful set of product innovations designed to reduce false positives and boost specificity in cardiac imaging. As the two most important aspects in cardiac imaging are motion-free and sharp visualization of the coronaries, the solutions are designed to maximize both temporal and spatial resolution.

Recently, CT perfusion (CTP) has emerged as a promising method of gaining insight into the hemodynamic relevance of a stenosis. It has been shown that combining cCTA with CTP increases the specificity in detecting significant stenoses. To keep CTP as accurate as possible, Siemens has developed features to improve specificity in this aspect of cardiac imaging, as well.

Read in our White Paper how the SOMATOM® Scanners and syngo.via help reduce false positive findings in cardiac CT.
Learn how to:

High temporal resolution to minimize motion artifacts
Motion-free visualization of the coronaries is essential for accurate diagnosis. If unaccounted for, motion artifacts affecting the coronaries may lead to overestimation of the degree of stenosis.

Our solutions:

Superior Specificity features coronary
  • High gantry rotation speeds for high temporal resolution without retrospective software corrections
  • Dual Source CT – Flash speed for imaging of all patients and all heart rates
  • Temporal resolution improvement with iTRIM


High spatial resolution for clear vessel depiction – High spatial resolution is necessary to fully grasp the anatomical detail of the coronary arteries. Insufficient spatial resolution and partial-volume effects may cause blooming artifacts.

Our solutions:

Superior Specificity features coronary
  • Dedicated edge-enhancing kernels for coronary imaging
  • Minimized blooming and enhanced vessel delineation with the Stellar Detector
  • Image sharpening for a thorough evaluation of calcified lesions and stents

Siemens understands institutions’ varying clinical and financial requirements and offers a wide range of suitable CT scanners. Unique to each scanner is a powerful combination of features to minimize false positive findings.