Plain radiography is the primary imaging modality for evaluating bone and joint abnormalities in children due to its wide availability, low cost, and ability to provide detailed anatomical information.

Ultrasound is the preferred imaging technique for diagnosing appendicitis in children due to its non-invasive nature, lack of radiation exposure, and ability to provide real-time visualization of the appendix.

Magnetic Resonance Imaging (MRI) is commonly used to evaluate the brain and central nervous system in children due to its excellent soft tissue contrast and ability to provide detailed anatomical and functional information.

Chest X-ray is the primary imaging modality for evaluating chest abnormalities in children due to its wide availability, low cost, and ability to provide detailed information about the lungs, heart, and mediastinum.

Ultrasound is commonly used to evaluate abdominal pain in children due to its non-invasive nature, lack of radiation exposure, and ability to provide real-time visualization of the abdominal organs.

Voiding Cystourethrogram (VCUG) is the preferred imaging technique for diagnosing urinary tract infections (UTIs) in children as it allows for the evaluation of the entire urinary tract during voiding.

Plain radiography is commonly used to evaluate suspected fractures in children due to its wide availability, low cost, and ability to provide detailed anatomical information about bones.

Barium Swallow and Enema are the primary imaging modalities for evaluating gastrointestinal abnormalities in children as they allow for the visualization of the entire gastrointestinal tract.

Chest X-ray is commonly used to evaluate suspected pneumonia in children due to its wide availability, low cost, and ability to provide detailed information about the lungs.

Echocardiogram is the preferred imaging technique for diagnosing congenital heart defects in children as it allows for the visualization and evaluation of the heart's structure and function.

Ultrasound is commonly used to evaluate suspected appendicitis in children due to its non-invasive nature, lack of radiation exposure, and ability to provide real-time visualization of the appendix.

Ultrasound is the primary imaging modality for evaluating suspected intussusception in children due to its non-invasive nature, lack of radiation exposure, and ability to provide real-time visualization of the bowel.

Ultrasound is commonly used to evaluate suspected pyloric stenosis in children due to its non-invasive nature, lack of radiation exposure, and ability to provide real-time visualization of the pylorus.

Barium Enema is the preferred imaging technique for diagnosing Hirschsprung's disease in children as it allows for the visualization of the entire colon and rectum.

Ultrasound is commonly used to evaluate suspected renal abnormalities in children due to its non-invasive nature, lack of radiation exposure, and ability to provide real-time visualization of the kidneys.