Purpose The purpose of this study is to evaluate the detection rate of pulmonary nodules in ultrashort echo time (UTE) lung magnetic resonance imaging (MRI) and to compare it with computed tomography (CT) in oncology patients. Materials and Methods All individuals undergoing radiotherapy/chemotherapy/regular follow-up or visiting the oncology department and referred to radiology department for nodule detection, during the period of 1 year, were subjected to UTE lung MRI using the sequence Flash 3d_spiralvibe coronal 1.25 mm iso and high-resolution CT lungs and the images were analyzed. Results Among the total number of nodules detected in both lungs of all patients, nodules detected by CT were 241, and nodules detected by MRI were 212. The nodule detection rate by MRI was 87.96%. The detection rate of nodules for size equal to or more than 5 mm was nearly 100%. For nodules less than 5 mm, and equal to or more than 4 mm, MRI showed a comparable detection rate of 75%, while for nodules less than 4 mm, the detection rate was only 25%. Conclusion Our study results indicate that lung MRI had a near-complete detection rate for nodules equal to or more than 5 mm in size. Hence, in oncology patients who are undergoing regular follow-up of the lung nodules, lung MRI using UTE can replace low-dose CT, which in turn reduces the radiation dose to the patient.

Purpose: This study aimed to nd the risk factors associated with the development of brosis in follow-up CT in patients of COVID-19 pneumonia. In this retrospective study, fty-four patients with RT-Methods: PCR proved COVID-19 pneumonia with two chest CTs in a 12-month interval between the initial and follow-up CT were included. Patients were classied into two groups: Patients with complete resolution and patients with brosis on follow-up CT. Demographic, laboratory, and therapeutic data and CT ndings were compared and analyzed. A total of 54 patientsResults: (38 men, 16 women) were included in this study. Post-COVID brosis and brotic-like changes were observed on follow-up CT scans in 34 of the 54 patients (63%). The remaining 20 patients (37%) showed no brotic changes with complete resolution. Patients with post covid brosis were signicantly older than those with normal CT. Males were affected more than females. Patients with post covid brosis had more comorbidities when compared with patients without comorbidities. Post-Covid brosis patients had a greater frequency of ICU admission, high frequency noninvasive mechanical ventilation( NIV), higher peak levels of C-reactive protein and D-dimer levels, low level of SpO2, and high CT Severity score in initial CT. Conclusion: Elderly patients, patients with comorbidities, high CT severity score, longer duration of hospital stay, ICU admission, high CRP and D dimer levels, Patients with NIV were associated with more prevalence of brosis in follow up CT.