Imaging in Chronic Thromboembolic Pulmonary Hypertension

Area of Science:

• Radiology
• Cardiology
• Pulmonary Medicine

Background:

• Chronic thromboembolic pulmonary hypertension (CTEPH) is a curable cause of pulmonary hypertension, often overlooked due to nonspecific symptoms.
• Early diagnosis and surgical evaluation are critical for improving patient outcomes in CTEPH.
• Nonspecific symptoms of CTEPH can mimic other conditions causing pulmonary hypertension.

Purpose of the Study:

• To review the role of various imaging techniques in diagnosing CTEPH.
• To evaluate the strengths and limitations of current imaging modalities for CTEPH.
• To explore emerging imaging techniques for CTEPH diagnosis and management.

Main Methods:

• Review of current imaging techniques including CT, pulmonary angiography, V/Q scanning, and MRI.
• Discussion of the diagnostic capabilities of each imaging modality for CTEPH.
• Exploration of novel imaging techniques like dual-energy CT and SPECT-CT V/Q scanning.

Main Results:

• Computed tomography (CT) and pulmonary angiography provide detailed structural information.
• Ventilation-perfusion (V/Q) scanning offers functional data, while MRI combines morphologic and functional data.
• Emerging techniques like dual-energy CT and SPECT-CT V/Q scanning aim to integrate anatomic and functional information.

Conclusions:

• Imaging is central to CTEPH diagnosis and surgical candidate selection.
• A combination of imaging tools is currently used, each with specific merits and limitations.
• Newer imaging techniques hold promise for enhancing the diagnosis and management of CTEPH.