104 topics with concise breakdowns: definitions, key facts, and class questions.
Pediatric diagnostic imaging is not just about taking "X-rays of small adults." This section covers the specifics of visualizing a growing body using radiography, CT, and MRI. It compiles age-related norms (newborn chest X-ray anatomy, brain development) and the specifics of applying modern technologies such as flat-panel detectors.
The material is structured by systems and covers the full spectrum of pathologies. Inside, you will find analyses of neonatal problems (bronchopulmonary dysplasia, esophageal atresia, necrotizing enterocolitis), uronephrology (renal developmental anomalies, vesicoureteral reflux), and neuroradiology (brain malformations, type 1 neurofibromatosis).
During practical classes and exams, instructors traditionally focus on emergency diagnostics and skeletal trauma. Be sure to learn the Salter-Harris fracture classification, imaging markers of non-accidental trauma in children (abusive head trauma/child abuse), as well as the differential diagnosis of acute conditions like meconium aspiration syndrome and volvulus.
What is the most common intraparenchymal lung tumor in children?
Most commonly, lung metastases from extrathoracic sources are found in the lungs of children, for example, in osteosarcoma or Wilms tumor.
What does the "corkscrew" sign mean during upper gastrointestinal contrast studies?
This pattern (corkscrew pattern) is pathognomonic for midgut volvulus. It reflects the spiral course of the duodenum and jejunum around the mesenteric vessels.
Why is lateral decubitus radiography needed if an upright radiograph can be taken?
Lateral decubitus radiography (performed in the frontal projection with a horizontal beam) is performed on a patient lying on their side to detect pleural effusion that is not visible in the upright position, or to confirm the nature of an equivocal opacity.
Why can digital radiography be more dangerous than film radiography in terms of dose?
On analog film, overexposure immediately ruined the image (it became overexposed). In digital systems, the device automatically adjusts brightness, so the physician may not visually notice the error and expose the patient to excess radiation.
What is the main problem of obtaining 3D images (FD-CT) on a C-arm?
The C-arm rotates relatively slowly, which inevitably leads to artifacts from patient breathing. In addition, the spatial resolution of such images is lower, and the dose load is higher than with diagnostic CT.
Why is it not possible to simply lower mAs (tube current) in children to reduce radiation exposure?
Reducing mAs proportionally increases image noise. Children have little visceral fat separating tissues, so noise drastically reduces diagnostic value; mAs often has to be increased to compensate.
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