Conventional Radiography, CT, and MRI in Bone Imaging Most examinations of bone start with conventional radiographs obtained with at least two views exposed at a 90-degree angle to each other (called orthogonal views ) so as to localize abnormalities better…
Magnetic resonance imaging (MRI) is a diagnostic modality capable of producing both anatomic and physiologic data that utilizes the molecular composition of tissues, especially water, to generate images with extraordinary contrast between soft tissues, surpassing the sensitivity of other imaging…
In this chapter, we will discuss some additional applications of ultrasound (US), including vascular ultrasound, pediatric applications of ultrasound, and point-of-care ultrasound. Case Quiz 19 Question This is a sagittal US image of the chest/right upper quadrant in a 75-year-old…
Ultrasound is a diagnostic imaging tool that makes use of probes (transducers) that can produce an acoustical frequency that is hundreds of times greater than humans can hear and that utilizes acoustical energy to localize and characterize human tissues. Case…
In this chapter, you will learn how to recognize some of the most common abnormalities in the abdomen. We will also discuss selected hepatic abnormalities. Chapter 18 , on ultrasound, describes some of the more common biliary and pelvic abnormalities.…
Soft-tissue calcifications lend themselves to a systematic approach that connects a diverse group of diseases. Although this chapter focuses primarily on abdominal calcifications, the same principles and approach apply to dystrophic calcification found anywhere in the body. Case Quiz 16…
Recognition of extraluminal air is an important finding that can have an immediate effect on the course of treatment. Air is normally not present in the peritoneal or extraperitoneal spaces, bowel wall, or biliary system. Air outside of the bowel…
In Chapter 12, Chapter 13 , we discussed how to recognize the normal intestinal gas pattern on conventional radiographs and computed tomography (CT). In this chapter, you will learn how to recognize and categorize the four most common abnormal bowel…
Introduction To abdominal and Pelvic CT It is estimated that around 90 million CT scans of all kinds were performed in the United States in 2019. Almost 10% of all visits to the emergency department are for abdominal pain of a…
While imaging of the abdomen is now largely performed utilizing CT, ultrasound, or MRI, many patients still have conventional radiographs (“plain films”) of the abdomen as a first step before other imaging studies are performed or as a method of…