File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: An MR-Conditional High-Torque Pneumatic Stepper Motor for MRI-Guided and Robot-Assisted Intervention

TitleAn MR-Conditional High-Torque Pneumatic Stepper Motor for MRI-Guided and Robot-Assisted Intervention
Authors
Issue Date2014
Citation
Annals of Biomedical Engineering, 2014, v. 42, p. 1823-1833 How to Cite?
AbstractMagnetic resonance imaging allows for visualizing detailed pathological and morphological changes of soft tissue. MR-conditional actuations have been widely investigated for development of image-guided and robot-assisted surgical devices under the Magnetic resonance imaging (MRI). This paper presents a simple design of MR-conditional stepper motor which can provide precise and high-torque actuation without adversely affecting the MR image quality. This stepper motor consists of two MR-conditional pneumatic cylinders and the corresponding supporting structures. Alternating the pressurized air can drive the motor to rotate each step in 3.6° with the motor coupled to a planetary gearbox. Experimental studies were conducted to validate its dynamics performance. Maximum 800 mN m output torque is achieved. The motor accuracy independently varied by two factors: motor operating speed and step size, was also investigated. The motor was tested within a 3T Siemens MRI scanner (MAGNETOM Skyra, Siemens Medical Solutions, Erlangen, Germany) and a 3T GE MRI scanner (GE SignaHDx, GE Healthcare, Milwaukee, WI, USA). The image artifact and the signal-to-noise ratio (SNR) were evaluated for study of its MRI compliancy. The results show that the presented pneumatic stepper motor generated 2.35% SNR reduction in MR images. No observable artifact was presented besides the motor body itself. The proposed motor test also demonstrates a standard to evaluate the pneumatic motor capability for later incorporation with motorized devices used under MRI.
Persistent Identifierhttp://hdl.handle.net/10722/203022
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChen, Yen_US
dc.contributor.authorKwok, KWen_US
dc.contributor.authorTse, ZTHen_US
dc.date.accessioned2014-09-19T11:08:06Z-
dc.date.available2014-09-19T11:08:06Z-
dc.date.issued2014en_US
dc.identifier.citationAnnals of Biomedical Engineering, 2014, v. 42, p. 1823-1833en_US
dc.identifier.urihttp://hdl.handle.net/10722/203022-
dc.description.abstractMagnetic resonance imaging allows for visualizing detailed pathological and morphological changes of soft tissue. MR-conditional actuations have been widely investigated for development of image-guided and robot-assisted surgical devices under the Magnetic resonance imaging (MRI). This paper presents a simple design of MR-conditional stepper motor which can provide precise and high-torque actuation without adversely affecting the MR image quality. This stepper motor consists of two MR-conditional pneumatic cylinders and the corresponding supporting structures. Alternating the pressurized air can drive the motor to rotate each step in 3.6° with the motor coupled to a planetary gearbox. Experimental studies were conducted to validate its dynamics performance. Maximum 800 mN m output torque is achieved. The motor accuracy independently varied by two factors: motor operating speed and step size, was also investigated. The motor was tested within a 3T Siemens MRI scanner (MAGNETOM Skyra, Siemens Medical Solutions, Erlangen, Germany) and a 3T GE MRI scanner (GE SignaHDx, GE Healthcare, Milwaukee, WI, USA). The image artifact and the signal-to-noise ratio (SNR) were evaluated for study of its MRI compliancy. The results show that the presented pneumatic stepper motor generated 2.35% SNR reduction in MR images. No observable artifact was presented besides the motor body itself. The proposed motor test also demonstrates a standard to evaluate the pneumatic motor capability for later incorporation with motorized devices used under MRI.en_US
dc.languageengen_US
dc.relation.ispartofAnnals of Biomedical Engineeringen_US
dc.titleAn MR-Conditional High-Torque Pneumatic Stepper Motor for MRI-Guided and Robot-Assisted Interventionen_US
dc.typeArticleen_US
dc.identifier.emailKwok, KW: kwokkw@hku.hken_US
dc.identifier.authorityKwok, KW=rp01924en_US
dc.identifier.doi10.1007/s10439-014-1049-xen_US
dc.identifier.pmid24957635-
dc.identifier.hkuros237212en_US
dc.identifier.volume42en_US
dc.identifier.spage1823en_US
dc.identifier.epage1833en_US
dc.identifier.isiWOS:000340394100003-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats