IMPLEMENTATION OF RADIO FREQUENCY IDENTIFICATION DEVICES IN 0.3 TESLA MAGNETIC RESONANCE IMAGING AND COMPUTED TOMOGRAPHY

2014 ◽  
Vol 26 (06) ◽  
pp. 1450069 ◽  
Author(s):  
M. Periyasamy ◽  
R. Dhanasekaran
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Ct Scanning ◽  
Reading Performance ◽  
Resonance Imaging ◽  
Rfid Tag ◽  
Frequency Identification

The aim of this work was to assess two issues concerning magnetic resonance imaging (MRI) including device functionality and image artifacts for the presence of ultra high frequency (UHF) radio frequency identification (RFID) devices in connection with 0.3 Tesla at 12.7 MHz MRI and computed tomography (CT) scanning. A total of 15 samples of RFID tags with two dissimilar sizes (wristband and ID card types) were tested. The tags were exposed to a several numbers of MR-imaging conditions during MRI examination and X-rays of CT scan. During the test, the tags were oriented in three different directions (axial, coronal and sagittal) pertaining to MRI system in order to encompass all possible situations with respect to the patient undergoing MRI and CT scanning, wearing a RFID tag on wrist. In addition to the device functionality test and imaging artifacts, we also analyzed the reading performance of the RFID reader considering significant factors in MRI scan area. We observed that the tags did not experience physical damage with its functionality remained unchanged even after MRI and CT scanning, and there was no modification in previously stored data as well. In addition, no evidence of artifact was observed in the acquired MR and CT images. Therefore, we can conclude that the use of passive UHF RFID tag is safe for a patient undergoing MRI at 0.3 T/12.7 MHz and CT scanning. However, the reading performance of the RFID reader got affected depending on whether the MRI machine was on or off and also by the angle of the reader antenna.

scholarly journals Assessment of Safety and Interference Issues of Radio Frequency Identification Devices in 0.3 Tesla Magnetic Resonance Imaging and Computed Tomography

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
M. Periyasamy ◽  
R. Dhanasekaran
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Ct Scanning ◽  
Resonance Imaging ◽  
Rfid Tag ◽  
Frequency Identification ◽  
Radio Frequency Identification Devices

The objective of this study was to evaluate two issues regarding magnetic resonance imaging (MRI) including device functionality and image artifacts for the presence of radio frequency identification devices (RFID) in association with 0.3 Tesla at 12.7 MHz MRI and computed tomography (CT) scanning. Fifteen samples of RFID tags with two different sizes (wristband and ID card types) were tested. The tags were exposed to several MR-imaging conditions during MRI examination and X-rays of CT scan. Throughout the test, the tags were oriented in three different directions (axial, coronal, and sagittal) relative to MRI system in order to cover all possible situations with respect to the patient undergoing MRI and CT scanning, wearing a RFID tag on wrist. We observed that the tags did not sustain physical damage with their functionality remaining unaffected even after MRI and CT scanning, and there was no alternation in previously stored data as well. In addition, no evidence of either signal loss or artifact was seen in the acquired MR and CT images. Therefore, we can conclude that the use of this passive RFID tag is safe for a patient undergoing MRI at 0.3 T/12.7 MHz and CT Scanning.

scholarly journals Computed Tomography and Magnetic Resonance Imaging Manifestations of Spinal Monostotic Fibrous Dysplasia

2018 ◽  
Vol 8 ◽  
pp. 23 ◽  
Author(s):  
Yu Zhang ◽  
Chuanyu Zhang ◽  
Shaohua Wang ◽  
Hexiang Wang ◽  
Yupeng Zhu ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Fibrous Dysplasia ◽  
Signal Intensity ◽  
Ct Scanning ◽  
Image Features ◽  
Resonance Imaging ◽  
Dark Signal ◽  
Ct And Mri

Aim: The purpose of the study was to analyze and summarize the computed tomography (CT) and magnetic resonance imaging (MRI) findings of spinal monostotic fibrous dysplasia (MFD) as well as evaluate the clinical value of CT and MRI in MFD diagnosis. Materials and Methods: CT (n = 4) and MRI (n = 5) images of six patients with pathologically confirmed spinal MFD were examined. The assessed image features included location, shape, rib involvement, vertebral collapse, margin, attenuation, and sclerotic rim on CT, as well as signal intensity, dark signal rim, and enhancement pattern on MRI. Results: In total, four of six patients underwent CT scanning. The most common findings on CT scanning were expansile lesions (n = 4), sclerotic rims (n = 4), and ground-glass opacity (GGO) (n = 4). In total, five of six patients underwent MRI. The lesions were low-signal intensity (n = 2), low-to-isointense signal intensity (n = 1), and low-signal intensity with several isointense portions (n = 2) on T1-weighted imaging (T1WI). The lesions were low-signal intensity (n = 1), isointense to high intensity (n = 1), and isointense signal intensity with several high portions (n = 3) on T2WI. A dark signal rim was found in most cases on T1WI and T2WI (n = 4). The lesions (n = 2) showed obvious enhancement. Conclusions: The CT and MRI manifestations of spinal MFD have the following characteristics: expansile lesion, GGO, sclerotic rim, and no obvious soft-tissue mass. The combined use of CT and MRI examinations is necessary for patients with suspected spinal MFD.

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