European radiology
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Comparative Study
Comprehensive imaging of residual/ recurrent nasopharyngeal carcinoma using whole-body MRI at 3 T compared with FDG-PET-CT.
To prospectively compare the diagnostic potential of 3-T wholebody magnetic resonance imaging (WB-MRI) and integrated fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) (FDG-PET-CT), and their combined interpretation for the detection of residual/recurrent nasopharyngeal carcinoma (NPC). ⋯ Three-Tesla WB-MRI achieved a similar diagnostic capability to FDGPET-CT for the detection of residual/recurrent NPC. Both techniques have different advantages, and their combined interpretation can yield a slightly higher diagnostic capability. In clinical practice, 3-T WB-MRI can offer an accurate and comprehensive assessment of residual/recurrent NPC.
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To compare the image quality of computed tomography pulmonary angiography (CTPA) obtained with the injection of various low doses of contrast medium (CM) with different injection-related factors. ⋯ The use of proper injection-related factors during CTPA, such as a low trigger level and a high flow rate with saline injection following a decreased CM volume (55 ml or 50 ml), will enable adequate pulmonary artery contrast enhancement.