<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi, <br class=""><div class=""><br class=""></div><div class="">I am using SimNIBS to simulate TMS-induced e-field and had two questions :</div><div class=""><br class=""></div><div class="">1- Is there any method to measure the exact distance between the coil and scalp surface? The 4mm default distance is not appropriate for my experiment; as the participants have EEG cap on and also there is a foam between the coil and the cap. Also, I’d like to account for the differences in the amount of hair, etc. I was thinking to measure the minimum euclidean distance between the coil centre and the scalp but as far as I understood the coil centre coordinates are actually scalp positions. So, it shouldn’t work.</div><div class=""><br class=""></div><div class="">2- My second question was about coil angle. I am using the angles that Brainsight provides to make the transformation matrix as below :</div><div class=""><br class=""></div><div class="">[ m0n0<span class="Apple-tab-span" style="white-space: pre;"> </span>-m0n1<span class="Apple-tab-span" style="white-space: pre;"> </span>m0n2 <span class="Apple-tab-span" style="white-space:pre"> </span>coil.center(1)</div><div class=""> m1n0<span class="Apple-tab-span" style="white-space: pre;"> </span>-m1n1<span class="Apple-tab-span" style="white-space: pre;"> </span>m1n2<span class="Apple-tab-span" style="white-space:pre"> </span>coil.center(2)</div><div class=""> m2n0<span class="Apple-tab-span" style="white-space: pre;"> </span>-m2n1<span class="Apple-tab-span" style="white-space: pre;"> </span>m2n2<span class="Apple-tab-span" style="white-space:pre"> </span>coil.center(3)] . </div><div class=""><br class=""></div><div class="">Could you please confirm if this matrix is correct. My understanding is that I need to inverse the y axis in Brainsight and it does not need any transformations (like MNI to subject space). Is that correct?</div><div class=""><br class=""></div><div class="">Greatly appreciate your help in advance!</div><div class=""><br class=""></div><div class="">Kind Regards,</div><div class="">Mana</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><div class="">
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text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0);" class=""><div style="margin: 0px; font-stretch: normal; line-height: normal; font-family: -apple-system, BlinkMacSystemFont, sans-serif; color: rgb(51, 51, 51); font-size: 14px;" class=""><div dir="auto" style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><div style="margin: 0px; font-stretch: normal; line-height: normal; font-family: -apple-system, BlinkMacSystemFont, sans-serif; color: rgb(51, 51, 51); font-size: 14px;" class=""><span class="" style="font-size: 11px; color: rgb(0, 0, 0); font-family: Helvetica;">---<br class=""></span><div class="" style="font-size: 12px; color: rgb(0, 0, 0); font-family: Helvetica;"><div class=""><b class="" style="font-size: 11px;">MANA BIABANI</b></div><div class=""><span class="" style="font-size: 11px;">Research Fellow</span></div><div class=""><span class="" style="font-size: 11px;"><br class=""></span></div><div class=""><strong style="font-family: Calibri, sans-serif;" class=""><span style="font-family: Arial, sans-serif; font-size: 11px;" class="">Turner Institute for Brain and Mental Health</span></strong></div><div style="margin: 0cm 0cm 0.0001pt; line-height: normal; font-family: Calibri, sans-serif;" class=""><span style="font-family: Arial, sans-serif; font-size: 11px;" class="">Monash University</span></div><div style="margin: 0cm 0cm 0.0001pt; line-height: normal; font-family: Calibri, sans-serif;" class=""><span style="font-family: Arial, sans-serif; font-size: 11px;" class="">18 Innovation Walk</span></div><div style="margin: 0cm 0cm 0.0001pt; line-height: normal; font-family: Calibri, sans-serif;" class=""><span style="font-family: Arial, sans-serif; font-size: 11px;" class="">Clayton VIC 3800</span></div><div style="margin: 0cm 0cm 0.0001pt; line-height: normal; font-family: Calibri, sans-serif;" class=""><span style="font-family: Arial, sans-serif; font-size: 11px;" class="">Australia</span></div><div style="margin: 0cm 0cm 0.0001pt; line-height: normal; font-family: Calibri, sans-serif;" class=""><span style="font-family: Arial, sans-serif; font-size: 11px;" class=""><br class=""></span></div></div><div class="" style="font-size: 12px; color: rgb(0, 0, 0); font-family: Helvetica;"><span class="" style="font-size: 11px;">E: <a href="mailto:mana.biabanimoghadam@monash.edu" class="">mana.biabanimoghadam@monash.edu</a></span></div><div class="" style="font-size: 12px; color: rgb(0, 0, 0); font-family: Helvetica;"><br class=""></div><div class="" style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px;"><div class="" style="margin: 0px; font-stretch: normal; line-height: normal; color: rgb(51, 51, 51);"><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; line-height: normal; color: rgb(51, 51, 51);"><br class=""></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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