Pulmonary MR Angiography: Is It Ready Now?

Ek, Yucel

doi:10.1148/radiology.210.2.r99fe65301

Cited by 11 publications

(2 citation statements)

References 26 publications

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“…In clinical practice, both MRA and CTA appear to be sensitive in the detection of lobar and proximal segmental emboli (Fig. 1), but may fail to detect smaller and distal segmental or subsegmental emboli [40,41,42,43]. The clinical relevance of smaller emboli remains a controversial point of discussion.…”

Section: Pulmonary Embolismmentioning

confidence: 99%

Pulmonary magnetic resonance angiography

1999

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In the past few years magnetic resonance angiography (MRA) of the pulmonary vasculature has advanced from a research tool to a clinically relevant imaging modality. Early 2D phase-contrast and time-of-flight (TOF) sequences without the use of contrast agents were time-consuming and limited by considerable imaging and motion artifacts. Since the introduction of MR scanners with stronger gradients (> 20 mT/m) and contrast-enhanced techniques, imaging of the pulmonary vasculature with adequate spatial resolution within a single breathhold is now possible. In the detection of pulmonary embolism in the lobar or segmental arteries, contrast-enhanced MRA is now on the verge of being considered an established modality, possibly competing with conventional pulmonary angiography and contrast-enhanced helical CT. In the future, utilization of phased-array torso coils, the application of navigator pulse sequences, and 3D time-resolved ultrafast MRA will overcome the final limitations of current techniques. Blood-pool MR contrast agents may provide a "one-stop-shopping" approach to the investigation of lower extremity veins and pulmonary arteries in venous thromboembolism.

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Section: Pulmonary Embolismmentioning

confidence: 99%

Pulmonary magnetic resonance angiography

1999

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“…Added advantages of this technique are its ability to produce images in three dimensions and the ability to produce many projections after a single acquisition, and the technique forms a routine part of an MRI investigation for cerebral aneurysms 3 . However, a variety of artifacts by phase or magnitude variations in the MR signal afflict MRA and has limited its use, especially in preoperative planning of vascular malformations and aneurysms 4 . Currently, the advent of CTA has been used in the diagnosis and preoperative planning for patients presenting with aneurysmal SAH 5 .…”

Section: Introductionmentioning

confidence: 99%

Diagnostic Validity of 3D-Computed Tomographic Angiography in Spontaneous Subarachnoid Haemorrhage

Mohammad

Rumi

Khan

et al. 2019

J. Natl Inst. Neurosci Bangladesh

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Background: Diagnostic validity of different tests for the detection of spontaneous subarachnoid haemorrhage is an important issue. Objectives: The purpose of the present study was to validate 3D-Computed tomographic angiography in spontaneous subarachnoid haemorrhage. Methodology: This cross-sectional study was carried out in the Department of Neurosurgery and Cath Lab of DMCH in collaboration with private diagnostic centre from September 2013 to February 2015 for a period of six (06) months. Adult patients diagnosed as a case of spontaneous SAH based on clinical features and confirmed by plain CT evidence of subarachnoid blood were included as study population. Patients having current history of trauma, poor clinical grade and agitated patient, patient with renal insufficiency, known allergy to iodinated contrast agent and patients who were not willing participate in the study were excluded from this study. Then both CT angiography and DSA were performed to detect cause of bleeding and to make a treatment planning. In this study DSA was considered as reference standard for evaluation of CTA. Sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy of CTA were calculated per patient basis and per aneurysmal basis. Result: A total number of 37 patients presented with spontaneous subarachnoid haemorrhage were recruited for this study. The mean age of patients was 58.53±7.54 years. Sensitivity and specificity in depicting intracranial aneurysms were, 93.75% and 100% respectively on a per-patient basis. Positive predictive value and negative predictive value of CTA are 100% and 71.43% respectively. CTA had shown 94.59% accuracy in detection of intracranial aneurysm. Sensitivity and specificity in depicting intracranial aneurysms were 94.74% and 100% respectively on a per-aneurysm basis. Positive predictive value and negative predictive value of CTA are 100% and 71.43% respectively. CTA had shown 95.35% accuracy in detection of intracranial aneurysm. Conclusion: In conclusion CTA has high detection capacity of aneurysm among spontaneous subarachnoid haemorrhage patients. Journal of National Institute of Neurosciences Bangladesh, 2019;5(1): 47-52

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