Table 1.
Medical subject headings and search strategy
| Medical subject heading | Entry terms |
|---|---|
| 1. Ultrasonography | Ultrasound Imaging |
| Imaging, Ultrasound | |
| Imagings, Ultrasound | |
| Ultrasound Imagings | |
| Sonography, Medical | |
| Medical Sonography | |
| Ultrasonic Imaging | |
| Imaging, Ultrasonic | |
| Echography | |
| Echotomography | |
| Echotomography, Computer | |
| Computer Echotomography | |
| Tomography, Ultrasonic | |
| Ultrasonic Tomography | |
| Diagnosis, Ultrasonic | |
| Diagnoses, Ultrasonic | |
| Ultrasonic Diagnoses | |
| Ultrasonic Diagnosis | |
| 2. Ultrasonography (subheading) | Ultrasonic diagnosis |
| Echography | |
| Echotomography | |
| 3. Ultrasonography, Doppler | Doppler Ultrasonography |
| Doppler Ultrasound Imaging | |
| Doppler Ultrasound Imagings | |
| Imaging, Doppler Ultrasound | |
| Imagings, Doppler Ultrasound | |
| Ultrasound Imaging, Doppler | |
| Ultrasound Imagings, Doppler | |
| Ultrasound | |
| 4. Education, medical, graduate | Education, Graduate Medical |
| Graduate Medical Education | |
| Medical Education, Graduate | |
| 5. Residency and Internship | Residency and Internship |
| Internship | |
| Internships | |
| Medical Residencies | |
| Residencies, Medical | |
| Residency, Medical | |
| Medical Residency | |
| Residency | |
| Residencies | |
| Residency, Dental | |
| Residencies, Dental | |
| Dental Residencies | |
| Dental Residency | |
| House Staff | |
| House Staffs | |
| Staff, House | |
| Staffs, House | |
| Internship, Dental | |
| Internships, Dental | |
| Dental Internship | |
| Dental Internships |
Searches: (1 or 2 or 3) and (4 or 5).