International Journal of Radiology and Diagnostic Imaging
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2019, Vol. 2, Issue 2, Part B

Role of measuring pulmonary artery size in interstitial lung disease using CT to evaluate pulmonary hypertension
Author(s)
Dr. Ritesh Kumar
Abstract
Aim: We aimed to determine how accurately various measures of the PA, as viewed on HRCT, predict right heart catheterisation (RHC)-confirmed pulmonary hypertension.
Methods: The present study was conducted in the Department of Radiology and 500 patients were included in the study. Patients with a CT scan within 90 days of MRI and RHC were included. In order to meet inclusion criteria, a diagnostic quality CT pulmonary angiogram (CTPA) with a slice thickness of less than 5 mm was required.
Results: We included 500 scans from 500 patients; 300 (60%) had RHC-confirmed pulmonary hypertension, with mPAP ⩾25 mmHg. Compared with the non-pulmonary hypertension group, the group with pulmonary hypertension had greater MPAD, RPAD, LPAD and PA: Ao in both respiratory cycles, whereas the PA angle was greater in the non-pulmonary hypertension group. In the subgroup with pulmonary hypertension, the median MPAD was 34.60 mm in inspiration and 34.65 mm in expiration, while in the non-pulmonary hypertension group, it was 30.00 mm in inspiration and 30.50 mm in expiration. For the cohort as a whole, the areas under the receiver operating characteristic curves (AUCs) for inspiratory MPAD and inspiratory PA: Ao (for RHC-confirmed pulmonary hypertension defined as Mpap ⩾25 mmHg) were 0.741 and 0.750, respectively. For the cohort as a whole, the cut-offs MPAD ⩾32.5 mm and PA: Ao ⩾0.94 yielded the most favourable diagnostic profiles.
Conclusion: Findings on HRCT may assist in the diagnosis of RHC-confirmed pulmonary hypertension. MPAD ⩾29 mm had high sensitivity and PA: Ao ⩾1.0 had high specificity. Compared with the entire cohort, MPAD had greater sensitivity in ILD and PA: Ao had higher specificity in COPD.
Pages: 126-130 | Views: 357 | Downloads: 187


International Journal of Radiology and Diagnostic Imaging
How to cite this article:
Dr. Ritesh Kumar. Role of measuring pulmonary artery size in interstitial lung disease using CT to evaluate pulmonary hypertension. Int J Radiol Diagn Imaging 2019;2(2):126-130. DOI: 10.33545/26644436.2019.v2.i2b.335
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