What question did this study set out to answer?

To compare visualization of pulmonary arterial branches across anatomic levels using single- and multi-detector row CT with different collimation widths in patients suspected of having acute pulmonary embolism.

May 1, 2003Radiology

Pulmonary Embolism: Optimization of Small Pulmonary Artery Visualization at Multi–Detector Row CT

Q: What is the clinical evidence from this study?

Study design: Observational. Population: Suspected acute pulmonary embolism (n=60). Intervention: Multi-detector row CT with 1.25-mm collimation vs. Single-detector row CT (3-mm collimation) and multi-detector row CT (2.5-mm collimation). Primary outcome: Frequency of well-visualized pulmonary arteries according to anatomic level (p=<.001).

View Full Paper

Ask AI

Bookmark

Key result

Multi-detector row CT at 1.25-mm collimation significantly improved visualization of subsegmental arteries compared to 3-mm single-detector CT (71-78% vs 37-39%; P<0.001) and interobserver agreement.

Why the study?

Does multi-detector row CT with thinner collimation improve visualization of pulmonary arteries compared to single-detector row CT in patients suspected of having acute pulmonary embolism?

Key Points

To compare visualization of pulmonary arterial branches across anatomic levels using single- and multi-detector row CT with different collimation widths in patients suspected of having acute pulmonary embolism.
Assessed 60 patients categorized into three equal protocols (N=20 each): single-detector CT (3-mm collimation), multi-detector CT (2.5-mm collimation), and multi-detector CT (1.25-mm collimation).
Three thoracic radiologists independently evaluated visualization quality for main, lobar, segmental, and subsegmental arteries and documented the presence or absence of pulmonary embolism.
Analyzed visualization frequencies using chi-square tests and quantified reader concordance with kappa statistics.
Thin-slice multi-detector CT (1.25-mm) significantly increased visualization rates of subsegmental arteries (71%–78% across readers vs. 37%–39% with single-detector CT, P < .001) and segmental arteries (85%–93% vs. 63%–77%, P < .001), with no significant difference for lobar arteries (P > .05).
Among 16 patients diagnosed with pulmonary embolism, interobserver agreement improved substantially with 1.25-mm multi-detector CT (segmental kappa = 0.79–0.80; subsegmental kappa = 0.71–0.76) compared with 3-mm single-detector CT (segmental kappa = 0.47–0.75; subsegmental kappa = 0.28–0.54).

Study Design

Type

Observational (n=60)

Structured PICO

Does multi-detector row CT with thinner collimation improve visualization of pulmonary arteries compared to single-detector row CT in patients suspected of having acute pulmonary embolism?

Population

60 patients suspected of having acute pulmonary embolism

Intervention

Multi-detector row CT with 1.25-mm or 2.5-mm collimation

Comparator

Single-detector row CT with 3-mm collimation and 1.3-1.6 pitch

Outcome

Frequency of well-visualized pulmonary arteries (main, lobar, segmental, and subsegmental) and interobserver agreement for detection of pulmonary embolismsurrogate

Main Result

p-value: p=<.001

Multi-detector row CT with 1.25-mm collimation significantly improves the visualization of small pulmonary arteries and interobserver agreement for detecting pulmonary embolism compared to single-detector row CT.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

MDCT with 1.25-mm collimation improves subsegmental visualization; leaves open impact on PE diagnostic accuracy and outcomes.

Cite This Study

Patel et al. (2003) conducted an observational in Suspected acute pulmonary embolism (n=60). Multi-detector row CT with 1.25-mm collimation vs. Single-detector row CT (3-mm collimation) and multi-detector row CT (2.5-mm collimation) was evaluated on Frequency of well-visualized pulmonary arteries according to anatomic level (p=<.001). Multi-detector row CT at 1.25-mm collimation significantly improved visualization of subsegmental arteries compared to 3-mm single-detector CT (71-78% vs 37-39%; P<0.001) and interobserver agreement.

synapsesocial.com/papers/6a10bc4b497e609eda6448d6 https://doi.org/10.1148/radiol.2272011139

Topics

Pulmonary embolism

View Full Paper

Ask AI

Bookmark

Pulmonary Embolism: Optimization of Small Pulmonary Artery Visualization at Multi–Detector Row CT

Key Points

Study Design

Structured PICO

Main Result

Discussion

Implication

Cite This Study

Topics

Pulmonary Embolism: Optimization of Small Pulmonary Artery Visualization at Multi–Detector Row CT

Key Points

Study Design

Structured PICO

Main Result

Discussion

Implication

Cite This Study

Also Consider

Topics

Also Consider