Chronic dyspnea is defined as dyspnea lasting more than one month.
Indications for CT/HRCT include :
- restrictive lung disease.
- preoperative assessment of patients who are being referred for lung reduction surgery.
- patients who have dyspnoea and reduced single-breath diffusing capacity for carbon monoxide without evidence of airflow obstruction.
- patients with chronic dyspnoea in whom the initial evaluation (clinical assessment, CXR and pulmonary testing) is non diagnostic or non revealing.
