# US 2014/0155740 A1 · Electromagnetic tomography solutions for scanning head > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155740 A1 - Document ID: US20140155740A1 - Status: Published application - Kind: A1 - Application number: 14/086,968 - Filed: 2013-11-21 - Published: 2014-06-05 - Earliest claimed: 2012-11-21 - Assignees: EMTensor GmbH - Applicants: EMTensor GmbH - Inventors: Serguei Y. SEMENOV - Web page: https://patentgrep.com/patent/US20140155740A1 ## CPC - A61B 5/0073: {by tomography, i.e. reconstruction of 3D images from 2D projections (A61B5/0066 takes precedence)} - A61B 5/0042: {for the brain} - A61B 5/05: Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves (measuring movement of the entire body or parts thereof A61B5/11; detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof A61B5/24) - A61B 5/0507: using microwaves or terahertz waves - A61B 5/4094: {Diagnosing or monitoring seizure diseases, e.g. epilepsy} - A61B 5/6814: {Head} - A61B 5/704: {Tables} - A61B 5/0046: {Arrangements of imaging apparatus in a room, e.g. room provided with shielding or for improved access to apparatus} - A61B 5/6803: {Head-worn items, e.g. helmets, masks, headphones or goggles} - A61B 2562/04: Arrangements of multiple sensors of the same type - A61B 2562/046: in a matrix array - A61B 2562/143: for coupling microwaves - A61B 2576/026: for the brain - G16H 30/40: for processing medical images, e.g. editing - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA ## Abstract An electromagnetic tomography system for gathering measurement data pertaining to a human head includes an image chamber unit, a control system, and a housing. The image chamber unit includes an antenna assembly defining a horizontally-oriented imaging chamber and including an array of antennas arranged around the imaging chamber. The antennas include at least some transmitting antennas and some receiving antennas. The control system causes the transmitting antennas to transmit a low power electromagnetic field that is received by the receiving antennas after passing through a patient's head in the imaging chamber. A data tensor is produced that may be inversed to reconstruct a 3D distribution of dielectric properties within the head and to create an image. The housing at least partially contains the antenna assembly and has a front entry opening into the imaging chamber. The head is inserted horizontally through the front entry opening and into the imaging chamber. ## Claims ### Claim 1 An image chamber unit for gathering measurement data pertaining to a human head in an electromagnetic tomography (EMT) system, comprising: (a) an antenna assembly at least partially defining a horizontally-oriented imaging chamber and including an array of antennas arranged around the imaging chamber, the array of antennas including at least some transmitting antennas and at least some receiving antennas, wherein the transmitting antennas transmit a low power electromagnetic field, wherein the receiving antennas receive the low power electromagnetic field after passing through a human head in the imaging chamber and provide corresponding signals to a control system so as to produce a data tensor that may be inversed to reconstruct a 3D distribution of dielectric properties within the human head and thereby to create an image of the object; and (b) a housing, at least partially containing the antenna assembly, having a front entry opening into the imaging chamber; (c) wherein the head of a human patient may be inserted horizontally through the front entry opening and into the imaging chamber. ### Claim 2 (depends on 1) The image chamber unit of claim 1, wherein the antenna assembly includes a plurality of antenna disks, each antenna disk including an array of antennas. ### Claim 3 (depends on 2) The image chamber unit of claim 2, wherein each antenna disk includes a center opening, wherein the imaging chamber is at least partially defined by the plurality of center openings. ### Claim 4 (depends on 3) The image chamber unit of claim 3, wherein the antenna disk center openings are circular and collectively define a cylindrical portion of the imaging chamber. ### Claim 5 (depends on 3) The image chamber unit of claim 3, wherein the antenna assembly further includes a back disk attached to a rear of the antenna disks, wherein the back disk closes and defines a rear of the horizontally-oriented imaging chamber. ### Claim 6 (depends on 2) The image chamber unit of claim 2, wherein the array of antennas on each antenna disk is arranged in a ring whose center axis is oriented horizontally. ### Claim 7 (depends on 6) The image chamber of claim 6, wherein the rings include a first set of rings of antennas that are transmitting and receiving antennas, and a second set of rings of antennas that are receiving antennas only. ### Claim 8 (depends on 7) The image chamber of claim 7, wherein the second set of rings is divided into two subsets, and wherein the first set of rings of antennas is located between the two subsets. ### Claim 9 (depends on 8) The image chamber of claim 8, wherein the first subset of rings includes one ring. ### Claim 10 (depends on 8) The image chamber of claim 8, wherein the second subset of rings includes four rings. ### Claim 11 (depends on 6) The image chamber of claim 6, wherein each ring includes 32 antennas. ### Claim 12 (depends on 1) The image chamber unit of claim 1, further comprising a flexible membrane separating a front portion of the imaging chamber from a rear portion of the imaging chamber. ### Claim 13 (depends on 12) The image chamber unit of claim 12, wherein the flexible membrane conforms to a portion of the shape of a human head when the human head is inserted through the front entry opening and into the front portion of the imaging chamber. ### Claim 14 (depends on 12) The image chamber unit of claim 12, wherein the rear portion of the imaging chamber is filled with a liquid. ### Claim 15 (depends on 14) The image chamber unit of claim 14, wherein the liquid is a matching liquid for an electromagnetic tomography operation. ### Claim 16 (depends on 15) The image chamber unit of claim 15, wherein the matching liquid is a mixture of glycerol, water and brine. ### Claim 17 (depends on 15) The image chamber unit of claim 15, wherein the antenna assembly further includes a back disk attached to a rear of a plurality of antenna disks, and wherein the back disk includes at least one inlet for pumping the matching liquid into the rear portion of the imaging chamber. ### Claim 18 (depends on 14) The image chamber unit of claim 14, further comprising a catch basin disposed adjacent the entry opening so as to receive liquid leaking from the front of the imaging chamber. ### Claim 19 (depends on 18) The image chamber unit of claim 18, wherein the catch basin includes a drain tube. ### Claim 20 (depends on 12) The image chamber of claim 12, further comprising a sanitary protective cap disposed in front of and against the flexible membrane to provide sanitary protection for a human head when the human head is inserted into the front entry opening and against the membrane. ### Claim 21 (depends on 1) The image chamber of claim 1, further comprising a protective ring around the entry opening to protect the human head from injury when inserting the head through the entry opening. ### Claim at position 22 22-102. (canceled)