Match each patient's clinical presentation to the single most appropriate initial or definitive imaging modality.
- A 32-year-old female at 28 weeks gestation presenting with sudden-onset pleuritic chest pain, tachypnea, a normal lower extremity ultrasound, and a normal chest radiograph.Ventilation-perfusion (V/Q) scan
- A 58-year-old male with longstanding diabetes mellitus evaluated in the clinic for a chronic plantar ulcer that probes to the bone; initial plain radiographs show no abnormalities.Magnetic resonance imaging (MRI) of the foot
- A 70-year-old male with a 50-pack-year smoking history undergoing evaluation for recent onset of painless gross hematuria.Computed tomography (CT) of the abdomen and pelvis with and without intravenous contrast
- A 24-year-old male presenting with progressively worsening headache and confusion two hours after sustaining a direct blow to the temporal region.Non-contrast computed tomography (CT) of the head
Cevap
Patient 1 matches with V/Q scan, Patient 2 matches with MRI of the foot, Patient 3 matches with CT of the abdomen and pelvis, and Patient 4 matches with Non-contrast CT of the head.
Each clinical scenario requires a specific imaging modality optimized for the suspected pathology and patient characteristics. A V/Q scan is optimal for pregnant patients with suspected PE and a normal CXR to reduce breast radiation. MRI is the gold standard for osteomyelitis. Multiphasic CT (CT urography) is the test of choice for high-risk gross hematuria to evaluate for urothelial and renal cancers. Non-contrast head CT provides rapid diagnosis of acute intracranial hemorrhage in trauma.
Adım Adım Çözüm
Anahtar Kavram
Selection of appropriate imaging modalities based on suspected clinical diagnosis, patient characteristics, and evidence-based diagnostic guidelines.