Intraoperative use of ultra-low-field, portable magnetic resonance imaging - first report

Ahmed Altaf, Muhammad Waqas Saeed Baqai, Faiza Urooj, Muhammad Sami Alam, Hafiza Fatima Aziz, Fatima Mubarak, Edmond Knopp, Khan Siddiqui, Syed Ather Enam

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Background: Intraoperative use of portable magnetic resonance imaging (pMRI) has become a valuable tool in a surgeon's arsenal since its inception. It allows intraoperative localization of tumor extent and identification of residual disease, hence maximizing tumor resection. Its utility has been widespread in high-income countries for the past 20 years, but in lower-middle-income countries (LMIC), it is still not widely available due to several reasons, including cost constraints. The use of intraoperative pMRI may be a cost-effective and efficient substitute for conventional MRI machines. The authors present a case where a pMRI device was used intraoperatively in an LMIC setting. Case Description: The authors performed a microscopic transsphenoidal resection of a sellar lesion with intraoperative imaging using the pMRI system on a 45-year-old man with a nonfunctioning pituitary macroadenoma. Without the need for an MRI suite or other MRI-compatible equipment, the scan was conducted within the confinements of a standard operating room. Low-field MRI showed some residual disease and postsurgical changes, comparable to postoperative high-field MRI. Conclusion: To the best of our knowledge, our report provides the first documented successful intraoperative transsphenoidal resection of a pituitary adenoma using an ultra-low-field pMRI device. The device can potentially enhance neurosurgical capacity in resource-constrained settings and improve patient outcomes in developing country.

Original languageEnglish
Article numberA1
JournalSurgical Neurology International
Publication statusPublished - 2023


  • Brain tumors
  • Intraoperative magnetic resonance imaging (Intraoperative MRI)
  • Portable magnetic resonance imaging (Portable MRI)
  • Ultra-low field magnetic resonance imaging (Ultra-low-field MRI)


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