• Title/Summary/Keyword: MRI room

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Safety Management for MR-Guided Interventions

  • Cherkashin, Mikhail;Berezina, Natalia;Serov, Alexey;Fedorov, Artem;Andreev, Georgy;Kuplevatsky, Vladymir
    • Investigative Magnetic Resonance Imaging
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    • v.20 no.3
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    • pp.152-157
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    • 2016
  • Purpose: Operating room management is the serious and complex task for hospital managers and the common approach is to develop relevant standard operational procedures. From patient and staff safety perspective, operating room management should be well-studied and hospital should identify and address any potential risks. Simultaneous usage of different imaging and less-invasive treatment technologies demands strong management control. Materials and Methods: We have formed the multidisciplinary expert panel (surgeons, anesthesiologists, radiologists, healthcare managers etc.) for hybrid theater management standard operational procedure development. On the first stage the general concept of hybrid room design and patient routing was developed. The second stage included the technical details discussion. For patient safety improvement we modified the Surgical Safety Check-list in accordance with potential MRI-related safety challenges and concerns. Results: WHO Surgical Safety Checklist is a simple and easy-to use tool which includes three blocks of question (grouped by the surgery process). We have developed two additional blocks of questions for the intraoperative magnetic resonance investigation. It is very important to have a special detailed routing with a strong control of ferromagnetic devices and anesthesiology care. Conclusion: High-energy MRI (1.5-3.0T) is characterized by potential influence on patient and staff safety in case of hybrid surgery. It is obvious to have a strong managerial control of ferromagnetic devices and anesthesiology care. Surgical Safety Checklist is the validated tool for improving patient safety. Modification and customization of this check-list potentially provides the opportunity for surgery processes improving.

Study on fabricated RF coil using high-temperature superconductor tape and matching circuit for low field MRI system (고온초전도 선재와 정합회로를 이용한 RF coil 제작에 대한 기초연구)

  • Kim, D.H.;Ko, R.K.;Kang, B.M.;Ha, D.W.;Sohn, M.H.;Mun, C.W.
    • Progress in Superconductivity and Cryogenics
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    • v.14 no.1
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    • pp.44-47
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    • 2012
  • The substantial improvement of the signal-to-noise ratio (SNR) can be achieved with small-size samples or low-field MRI system by high-temperature superconducting(HTS) RF coil. The typical HTS RF coil made of HTS thin film is expensive and is limited the coil geometry to planar surface coil. In this study, commercial Bi-2223 HTS tapes was used as RF coil for a 0.35T permanent MRI system. It has advantages of both much lower cost and easier fabrication over HTS thin film coil. SNR gain of the image obtained from the HTS RF coil over a conventional Cu RF coil at room temperature was about 2.4-fold and 1.9-fold using the spin echo pulse sequence and gradient echo pulse sequence respectively.

Preparation of Chitosan-coated Magnetite Nanoparticles by Sonochemical Method for MRI Contrast Agent

  • Cho, Jun-Hee;Ko, Sang-Gil;Ahn, Yang-Kyu;Choi, Eun-Jung
    • Journal of Magnetics
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    • v.14 no.3
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    • pp.124-128
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    • 2009
  • Magnetic nanoparticles were synthesized by using the sonochemical method with oleic acid as a surfactant. The average size of the magnetite nanoparticles was controlled by varying the ratio R=[$H_2O$]/[surfactant] in the range of 2 to 9 nm. To prepare chitosan-coated magnetite nanoparticles, chitosan solution was added to a magnetite colloid suspension under ultrasonication at room temperature for 20 min. The chitosan-coated magnetite nanoparticles were characterized by several techniques. Atomic force microscopy (AFM) was used to image the chitosan-coated nanoparticles. Magnetic hysteresis measurement was performed by using a superconducting quantum interference device (SQUID) magnetometer to investigate the magnetic properties of the magnetite nanoparticles and the chitosan-coated magnetite nanoparticles. The SQUID measurements revealed the superparamagnetism of both nanoparticles. The T1- and T2-weighted MR images of these chitosan-coated magnetite colloidal suspensions were obtained with a 4.7 T magnetic resonance imaging (MRI) system. The chitosancoated magnetite colloidal suspensions exhibited enhanced MRI contrasts in vitro.

A Case of Intramedullary Spinal Tuberculoma and Multiple Brain Tuberculoma Associated with Pulmonary Tuberculosis (폐결핵 치료중 발현된 척수내결핵종 및 다발성 뇌결핵종 1예)

  • Lee, Hyang-Ju;Kim, Chung-Tae;Cho, Dong-Il;Rhu, Nam-Soo;Cho, Phil-Za
    • Tuberculosis and Respiratory Diseases
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    • v.49 no.2
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    • pp.237-245
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    • 2000
  • Tuberculomas in the spine are estimated to be 15 to 50 times less common than those occurring in the cranium. We experienced a case of intramedullary spinal tuberculoma and brain tuberculoma associated with pulmonary tuberculosis. A 39-year-old male was referred to the National Medical Center via emergency room because of urinary difficulty lower limb weakness for 3 days. He had been treated with anti-tuberculosis regimens against pulmonary tuberculosis for 20 days. Spinal MRI revealed intradural intramedullary tuberculoma at T5. On the 21st day at the hospital, a generalized seizure attacked him. Brain MRI revealed multiple tuberculoma in both hemispheres, brainstem and cerebellum. He was treated anti-tuberculosis regimens and corticosteroids for 9 months. His condition improved clinically and radiologically. We report this case with a review of the literature.

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Development of Respiration Sensors Using Plastic Optical Fiber for Respiratory Monitoring Inside MRI System

  • Yoo, Wook-Jae;Jang, Kyoung-Won;Seo, Jeong-Ki;Heo, Ji-Yeon;Moon, Jin-Soo;Park, Jang-Yeon;Lee, Bong-Soo
    • Journal of the Optical Society of Korea
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    • v.14 no.3
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    • pp.235-239
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    • 2010
  • In this study, we have fabricated two types of non-invasive fiber-optic respiration sensors that can measure respiratory signals during magnetic resonance (MR) image acquisition. One is a nasal-cavity attached sensor that can measure the temperature variation of air-flow using a thermochromic pigment. The other is an abdomen attached sensor that can measure the abdominal circumference change using a sensing part composed of polymethyl-methacrylate (PMMA) tubes, a mirror and a spring. We have measured modulated light guided to detectors in the MRI control room via optical fibers due to the respiratory movements of the patient in the MR room, and the respiratory signals of the fiber-optic respiration sensors are compared with those of the BIOPAC$^{(R)}$ system. We have verified that respiratory signals can be obtained without deteriorating the MR image. It is anticipated that the proposed fiber-optic respiration sensors would be highly suitable for respiratory monitoring during surgical procedures performed inside an MRI system.

The Study on the Superconducting MRI Magnet of 68 cm in Room Temperature Bore (68 cm 상온 보아를 갖는 MRI용 초전도마그네트에 관한 연구)

  • Jin, H.B.;Oh, B.H.;Cho, J.W.;Oh, S.S.;Kwon, Y.K.;Ha, D.W.;Lee, E.Y.;Kim, H.J.;Kim, O.K.;Choi, B.J.;Ryu, K.S.
    • Proceedings of the KOSOMBE Conference
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    • v.1996 no.11
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    • pp.142-146
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    • 1996
  • In this paper, we present the main research results on the 2 Tesla class - superconducting MRI magnet which we have developed. Multi section type superconducting MRI main coil and various superconducting shims were designed and fabricated for obtaining the high field homogeneity, which is requested in the MR imaging. After assembling the magnet with room temperature bore cryostat field homogenity has been measured and analyzed by NMR field mapping system. According to this, field homogeneity of 22 ppm / 30 cm dsv was confirmed.

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Design and manufacturing of the MRI Cryostat (MRI용 CRYOSTAT의 설계 제작)

  • Cho, Jeon-Wook;Lee, Eon-Yong;Kwon, Young-Kil;Ryu, Kang-Sik;Ryu, Choong-Sik;Kwon, Oh-Bum;Lee, Hong-Ju;Lee, Hai-Sung;Fukui, T.;Komoshita, T.
    • Proceedings of the KIEE Conference
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    • 1995.07a
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    • pp.144-146
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    • 1995
  • A superconducting 2 tesla MRI magnet for the animal magnetic resonance imaging has been developed as a basic model for the application of the precise supercoducting magnet technology. MRI cryostat with 210mm room temperature bore was designed and manufactured for this magnet. The cryostat was designed basically not only to extract the principal design parameters at the performance test but also for the convenience of the manufacturing. The most extinct feacture of the cryostat is that it does not have $LN_{2}$ tank and the 77K thermal shield is cooled by circuling $LN_{2}$ through copper pipe which is welded around the shield plate. It results in reduction of the total cryostat size(about 30%).

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Acute Cervical Spinal Subdural Hematoma Not Related to Head Injury

  • Kim, Hee-Yul;Ju, Chang-Il;Kim, Seok-Won
    • Journal of Korean Neurosurgical Society
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    • v.47 no.6
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    • pp.467-469
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    • 2010
  • We report an extremely rare case of traumatic cervical spinal subdural hematoma not related to intracranial injury. There has been no report on traumatic cervical spinal subdrual hematoma not related to intracranial injury. A 27-year-old female patient was admitted to our emergency room due to severe neck pain and right arm motor weakness after car collision. On admission, she presented with complete monoplegia and hypoesthesia of right arm. Magnetic resonance imaging (MRI) revealed subdural hematoma compressing spinal cord. Lumbar cerebrospinal fluid (CSF) analysis revealed 210,000 red blood cells/$mm^3$. She was managed conservatively by administrations of steroid pulse therapy and CSF drainage. Her muscle power of right arm improved to a Grade III 16 days after admission. Follow-up MRI taken 16th days after admission revealed almost complete resolution of the hematoma. Here, the authors report a traumatic cervical spinal SDH not associated with intracranial injury.

Neurologic Complication Following Spinal Epidural Anesthesia in a Patient with Spinal Intradural Extramedullary Tumor

  • Kim, Sung-Hoon;Song, Geun-Sung;Son, Dong-Wuk;Lee, Sang-Won
    • Journal of Korean Neurosurgical Society
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    • v.48 no.6
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    • pp.544-546
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    • 2010
  • Paraplegia following spinal epidural anesthesia is extremely rare. Various lesions for neurologic complications have been documented in the literature. We report a 66-year-old female who developed paraplegia after left knee surgery for osteoarthritis under spinal epidural anesthesia. In the recovery room, paraplegia and numbness below T4 vertebra was checked. A magnetic resonance image (MRI) scan showed a spinal thoracic intradural extramedullary (IDEM) tumor. After extirpation of the tumor, the motor weakness improved to the grade of 3/5. If a neurologic deficit following spinal epidural anesthesia does not resolve, a MRI should be performed without delay to accurately diagnose the cause of the deficit and optimal treatment should be rendered for the causative lesion.

A Research on State Infection Control for Empolyee at Inspection Room of MRI (자기공명영상 검사실 업무종사자의 감염관리 실태에 관한 연구)

  • Ra, Kil-Soo;Lim, Chung-Hwan;Jeung, Seung-Woon
    • Proceedings of the Korea Contents Association Conference
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    • 2015.05a
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    • pp.163-164
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    • 2015
  • 본 연구에서는 영상의학과에서 시행하는 검사 중 MRI검사실에서 근무하는 방사선사들의 감염에 대한 인식을 조사하고, 가장 많이 사용하고 있는 키보드와 마우스에 대한 감염관리 실태를 파악함으로써, 작업종사자의 감염관리의 중요성 및 교육의 필요성을 제시하고자 한다.

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