The establishment of national diagnostic reference levels for adult SPECT-CT in Saudi Arabia.

This study aims to introduce national diagnostic reference levels (NDRLs) for adult hybrid single photon emission computed tomography (SPECT-CT) in nuclear medicine (NM) departments in the Kingdom of Saudi Arabia. The administered activity (AA) of radiopharmaceuticals, volume-weighted computed tomography dose index (CTDIvol) and dose length product (DLP) for ten hybrid SPECT/CT examinations were collected and analysed for one year. The median of AA, CTDIvoland DLP for each dose quantity was derived and the suggested national DRLs were determined based on the 75thpercentile for all identified SPECT-CT examinations. A comparison of the defined adult NDRLs in Saudi Arabia with the published data of other countries was performed. Although there are no significant variations of the proposed NDRL of AA between countries, the proposed NDRLs of the integrated CT metrics exceed the published data in most procedures. NM departments are urged to consider optimisation for both image quality and radiation protection.

Comparison of the perspectives of the pediatric surgeons and pediatric urologists in management of cryptorchidism in Saudi Arabia.

OBJECTIVES: To evaluate the variability in perspectives between pediatric surgeons and pediatric urologists in managing cryptorchidism. METHODS: We conducted this survey among pediatric surgeons and pediatric urologists managing cryptorchidism in Saudi Arabia in October 2020. We distributed a questionnaire to 187 consultants using the Google forms platform. We collected data related to the consultant's experience, preoperative management, management of nonpalpable testes, management of palpable undescended testes, management of the cryptorchidism in special situations. RESULTS: The response rate was 77% for pediatric surgeons (n=77) and 46% for pediatric urologists (n=40). The number of cases managed by each specialty per year differed significantly (p=0.02); however, there was no significant difference in their experience (p=0.37). The preferred age for orchidopexy was 6-12 months for both specialties. Pediatric surgeons tend to prescribe preoperative ultrasound more frequently for nonpalpable testes (p=0.05). Laparoscopy was the preferred surgical approach by both specialties. Management of intra-abdominal testes not reaching the contralateral internal ring differed between groups (p<0.001), and it was related to the number of procedures performed annually (p=0.03). Both groups responded differently to the management of unsatisfactory testicular position after orchidopexy (p<0.001). Pediatric surgeons managed it with either observation or re-operative inguinal orchidopexy; however, most pediatric urologists preferred re-operative inguinal orchidopexy. This response was affected by the number of procedures performed annually (p=0.04). CONCLUSION: In Saudi Arabia, practicing pediatric surgeons and pediatric urologists have different perspectives in the management of cryptorchidism. The results of this survey demonstrated the need to establish national guidelines to manage patients with cryptorchidism.