CN112755412A - External measuring device and method for radioactive particle implantation dose - Google Patents
External measuring device and method for radioactive particle implantation dose Download PDFInfo
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- CN112755412A CN112755412A CN202110214053.3A CN202110214053A CN112755412A CN 112755412 A CN112755412 A CN 112755412A CN 202110214053 A CN202110214053 A CN 202110214053A CN 112755412 A CN112755412 A CN 112755412A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/103—Treatment planning systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
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Abstract
The invention relates to a radioactive particle implantation dosage in-vitro measuring device and a method, the device comprises a fixing ring, one end of the fixing ring is provided with a dosage measuring ring coaxial with the fixing ring, the fixing ring and the dosage measuring ring are connected with each other through a distance adjusting mechanism, the distance between the fixing ring and the dosage measuring ring is adjusted by the distance adjusting mechanism, the fixing ring is provided with a plurality of fixing rods along the circumferential direction, the length direction of the fixing rods is the radial direction of the fixing ring, a plurality of dosimeters are arranged on the dosage measuring ring along the circumferential direction, the length direction of the dosimeters is the radial direction of the dosage measuring ring, and the dosage measuring ring is provided with a telescopic adjusting mechanism for adjusting the telescopic amount of all the dosimeters. The invention directly measures the dosage of the measured object, can lead the dosage measurement result to be objective and accurate, and can carry out multi-layer and 360-degree dosage measurement on the measured object.
Description
Technical Field
The invention relates to a radioactive particle implantation dose measuring technology, in particular to an in-vitro radioactive particle implantation dose measuring device and method.
Background
The radioactive particle implantation is an operation for implanting a miniature radioactive source into the interior of a tumor, and the radioactive source can continuously release rays to kill the tumor after being implanted into the tumor. At present, the postoperative dose is used for evaluating whether the dose distribution after the radioactive source is implanted is reasonable or not in clinical work. The specific method comprises the steps of scanning CT/MRI or ultrasound for a patient after operation, inputting the image data into a computer treatment planning system, identifying the position and the number of particles after a target area is sketched, and then calculating the dose distribution. However, there are a number of problems with post-operative dose calculation: if the calculation result is accurate, verification is required by using a measurement method; results calculated by different people are inconsistent, and human errors are large; the method is not objective enough, and the calculation results of different hospitals are different and have no comparability; the accurate position identification of the particles after the operation is difficult; the number of particles and the activity of the particles must be predicted. Based on the current state of the art, various deficiencies of the above dose calculation remain unresolved.
Disclosure of Invention
The invention aims to provide an in-vitro measuring device and method for radioactive particle implantation dose, which are used for verifying the accuracy of dose calculation, solving the problems that the existing radioactive particle implantation dose calculation result is greatly influenced by personal subjectivity, has large error and is not comparable, changing the dose calculation into dose measurement and obtaining more accurate dose distribution and dose parameters.
The invention is realized by the following steps: the utility model provides an external measuring device of radioactive seeds implantation dosage, includes solid fixed ring the one end of solid fixed ring is provided with the dosimetry ring rather than coaxial, gu fixed ring with the dosimetry ring is through distance adjustment mechanism interconnect, gu fixed ring with the interval of dosimetry ring by distance adjustment mechanism adjusts gu fixed ring is last to be provided with a plurality of dead levers along the circumferencial direction, the length direction of dead lever does gu fixed ring's radial direction last to be provided with a plurality of dosimeters along the circumferencial direction, the length direction of dosimeter does dosimetry ring's radial direction be provided with the flexible adjustment mechanism who is used for adjusting all dosimeters flexible volume on the dosimetry ring.
Still include the measured object mount, the object mount includes cylindric support main part the wearing has connect the measured object holder in the support main part, the measured object holder is by the straight tube with be located the taper pipe of straight tube one end is constituteed, taper pipe portion comprises a plurality of lamella bodies, and it has the gap to reserve between the adjacent lamella body, the straight tube is pegged graft in the support main part, the straight tube with be threaded connection between the support main part.
The fixed ring and the dose measuring ring are buckled by two semicircular rings.
The telescopic adjusting mechanism comprises a position adjusting ring which is arranged on the dose measuring ring and is coaxial with the dose measuring ring, threads are arranged on the cylindrical surface of the dose meter, helical teeth are arranged on the end surface of the position adjusting ring, the helical teeth on the end surface of the position adjusting ring are matched with the threads on the dose meter, and the position adjusting ring is rotated to drive the dose meter to move along the length direction of the dose meter.
The position regulating ring is composed of two semicircular rings.
The distance adjusting mechanism comprises an adjusting rod, the adjusting rod penetrates through the fixing ring, the adjusting rod is in threaded connection with the fixing rod, and the end of the adjusting rod is rotatably connected with the dose measuring ring.
The invention also discloses an in vitro measuring method of the radioactive particle implantation dose, which comprises the following steps:
a. prepare the external measuring device of radioactive seed implantation dosage, including solid fixed ring the one end of solid fixed ring is provided with rather than coaxial dosimetry ring, gu fixed ring with dosimetry ring passes through distance adjustment mechanism interconnect, gu fixed ring with dosimetry ring's interval by distance adjustment mechanism adjusts gu fixed ring is last to be provided with a plurality of dead levers along the circumferencial direction, the length direction of dead lever does gu fixed ring's radial direction last be provided with a plurality of dosimeters along the circumferencial direction of dosimetry ring, the length direction of dosimeter does dosimetry ring's radial direction be provided with on the dosimetry ring and be used for adjusting dosimetry flexible volume's flexible adjustment mechanism.
b. The inner end of the fixed rod is coincided with the inner wall of the fixed ring by rotating the fixed rod, and the dosimeter is adjusted by the telescopic adjusting mechanism to coincide with the inner wall of the dosimeter ring.
c. The fixed ring and the dose measuring ring are sleeved on the object to be measured, and the fixed rod is rotated to fix the object to be measured in the center of the fixed ring.
d. The distance between the dose measuring ring and the fixing ring is adjusted through the distance adjusting mechanism, so that the plane where the dosimeter on the dose measuring ring is located coincides with the plane to be measured.
e. And (3) adjusting the telescopic amount of the dosimeters by using a telescopic adjusting mechanism, so that the inner ends of all the dosimeters reach positions to be measured, and measuring the doses at the positions by using the dosimeters.
f. And adjusting the distance adjusting mechanism and the telescopic adjusting mechanism for multiple times, measuring different planes and different distances of the measured object, and recording the measuring result and the measuring point position corresponding to the dosimeter.
g. After the measurement is finished, the inner end of the dosimeter is returned to the inner wall of the dose measuring ring through the telescopic adjusting mechanism, then the fixed rod is rotated to return the inner end of the fixed rod to the inner part of the fixed ring, and the measured object is separated from the dose measuring ring and the fixed ring.
The device for measuring the radioactive particle implantation dose in vitro further comprises a measured object fixing frame, wherein the object fixing frame comprises a cylindrical support main body, a measured object clamp is connected in the support main body in a penetrating manner, the measured object clamp consists of a straight pipe and a conical pipe located at one end of the straight pipe, the conical pipe part consists of a plurality of petals, gaps are reserved between the adjacent petals, the straight pipe is inserted in the support main body, and the straight pipe is in threaded connection with the support main body; when the measured object volume is less, place the measured object in the measured object holder, cup joint the support main part on the straight tube of measured object holder, slowly rotate the support main part makes the toper pipe press from both sides the measured object tightly gradually.
The fixed ring and the dose measuring ring are buckled by the two semicircular rings, when a measured object cannot directly pass through the fixed ring and the dose measuring ring, the fixed ring and the dose measuring ring are sleeved on the measured object after being opened, and then the fixed ring and the dose measuring ring are buckled into a whole again respectively.
The position regulating ring is composed of two semicircular rings.
The invention uses the dosimeter to directly measure the dosage of the measured object, changes the traditional dosage verification mode, and can be used for verifying whether the dosage calculation result is accurate. By directly measuring the dosage, the artificial error is eliminated, and the result is more objective and accurate. Because the dose after the implantation of the particles is directly measured, the number and activity of the implanted particles are not required to be known in advance. Compared with the existing dosimeters, the dosimeters are distributed on a plane in 360 degrees, the dosage of each direction of the plane can be measured, no dead angle exists, and the position of the dosimeter can be adjusted, so that the dosage distribution of different radiuses on the plane can be measured. The whole device can keep consistent with the relative position of the measured object through the fixing column, and the relative position relation between any measuring point and the measured object can be well recorded. By adjusting the position of the dosimetry ring, doses at different levels can be measured, enabling three-dimensional dosimetry. Can be fixed on a human body or a particle implantation model, and the measurement time can be freely selected.
Drawings
FIG. 1 is a schematic of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a schematic view of the measured object fixing frame of the invention.
Fig. 4 is a right side view of fig. 3.
FIG. 5 is a schematic view of the installation of the position control ring and dosimeter of the present invention.
FIG. 6 is a schematic of a position control loop control dosimeter of the invention.
In the figure: 1. a fixing ring; 2. a dose measuring ring; 3. fixing the rod; 4. a dosimeter; 5. a stent body; 6. a clamp holder for the object to be measured; 7. a position control loop; 8. adjusting a rod; 2-1, an annular groove; 6-1, straight pipe; 6-2, a conical tube; 7-1, helical teeth; 7-2 and a handle.
Detailed Description
As shown in fig. 1 and 2, the external measuring device for the radioactive seed implantation dosage of the present invention comprises a fixing ring 1, a dosage measuring ring 2 coaxial with the fixing ring 1 is arranged at one end of the fixing ring 1, the fixing ring 1 and the dosage measuring ring 2 are connected with each other through a distance adjusting mechanism, the distance between the fixing ring 1 and the dosage measuring ring 2 is adjusted by the distance adjusting mechanism, a plurality of fixing rods 3 are arranged on the fixing ring 1 along the circumferential direction, the length direction of the fixing rods 3 is the radial direction of the fixing ring 1, a plurality of dosimeters 4 are arranged on the dosage measuring ring 2 along the circumferential direction, the length direction of the dosimeters 4 is the radial direction of the dosage measuring ring 2, and a telescopic adjusting mechanism for adjusting the telescopic amount of all the dosimeters 4 is arranged on the dosage measuring ring.
As shown in fig. 3 and 4, the device for measuring the dose of the implanted radioactive seeds in vitro further comprises a measured object fixing frame, the object fixing frame comprises a cylindrical support main body 5, a measured object holder 6 penetrates through the support main body 5, the measured object holder 6 consists of a straight pipe 6-1 and a conical pipe 6-2 positioned at one end of the straight pipe, the conical pipe 6-2 consists of a plurality of petals, gaps are reserved between the adjacent petals, the straight pipe 6-1 is inserted into the support main body 5, and the straight pipe 6-1 is in threaded connection with the support main body 5.
When the device is used, the support main body 5 is rotated to enable the conical tube 6-2 to move along the axial direction relative to the support main body 5, when the device for clamping the object to be tested 6 moves in the support main body 5, the end part of the straight tube 6-1 gradually sleeves the conical tube 6-2 tightly, and under the action of the conical surface, the petals are gradually tightened or loosened, so that the object to be tested is clamped or loosened by the device for clamping the object to be tested 6.
The object to be measured holder 6 generally comprises three petals that the shape is the same, and when using, places the object to be measured in the middle of three petals, when three petals tighten up and extrude the object to be measured, can fix the axle center position at object to be measured holder 6 with the object to be measured.
The fixing ring 1 and the dose measuring ring 2 are both formed by buckling two semicircular rings. One ends of the two semicircular rings are connected through a rotating shaft or a hinge and the like, the other ends of the two semicircular rings are connected through a lock catch, and the fixing ring 1 or the dose measuring ring 2 can be opened by opening the lock catch. The positions of the rotating shaft and the lock catch of the fixing ring 1 and the dose measuring ring 2 are the same, so that the opening positions of the fixing ring and the dose measuring ring are the same, and the objects can be conveniently put in and taken out when the device is used.
The end part of the fixed column is provided with the soft cushion, so that the discomfort of the measured object is reduced when the end part of the fixed column is contacted with the measured object.
The dosimeters 4 are uniformly distributed on the dose measuring ring 2 in a circumferential manner around the axis of the dose measuring ring 2, 360-degree measurement can be performed on the measuring surface, when the number of the dosimeters 4 is larger, the measurement on the measuring surface is more comprehensive, and one dosimeter 4 is arranged on the circumferential surface of the dose measuring ring 2 at intervals of 1 degree under the condition of necessary conditions and allowable conditions, so that the high-precision measurement of the measured object is realized.
As shown in fig. 5 and 6, the telescopic adjusting mechanism comprises a coaxial position regulating ring 7 arranged on the dose measuring ring 2, the position regulating ring 7 is embedded on the dose measuring ring 2 and can rotate around the axis of the dose measuring ring, a thread is arranged on the cylindrical surface of the dosimeter 4, a helical tooth 7-1 is arranged on the end surface of the position regulating ring 7, the helical tooth 7-1 on the end surface of the position regulating ring 7 is matched with the thread on the dosimeter 4, the dosimeter 4 is connected to the dose measuring ring 2 in a penetrating manner, the cylindrical dosimeter 4 can move in a through hole of the dose measuring ring 2, and the dosimeter 4 is driven to move along the length direction of the dosimeter 4 by rotating the position regulating ring 7. If necessary, a small motor drive can be provided for each dosimeter 4 individually to adjust each dosimeter position individually for measuring surface doses of various profile objects.
In order to ensure that the dosimeter 4 can be driven by the position control ring 7, an included angle between the helical teeth 7-1 and the length direction of the dosimeter 4 is larger than 45 degrees and smaller than 90 degrees, when the angle of the helical teeth 7-1 is within the range, self-locking does not exist between the helical teeth 7-1 and the surface threads of the dosimeter 4, and the helical teeth 7-1 can move in a manner of being matched with the threads on the surface of the dosimeter 4 to drive the dosimeter 4 to move along the axial direction.
The position regulating ring 7 consists of two semicircular rings which are just spliced into a complete circular ring, the circular ring is positioned in the annular groove 2-1 on the dose measuring ring 2, the handle 7-2 is arranged on the position regulating ring 7, and the position regulating ring 7 can be driven to move in the annular groove 2-1 through the handle 7-2. When the dose measuring ring 2 needs to be opened, the joint of the two semicircular rings of the position regulating ring 7 and the joint of the two semicircular rings of the position regulating ring 7 are overlapped through the handle 7-2, and then the lock catch is opened to open the two groups of semicircular rings.
The distance adjusting mechanism comprises an adjusting rod 8, the adjusting rod 8 penetrates through the fixing ring 1, the adjusting rod 8 is in threaded connection with the fixing ring 1, and the end of the adjusting rod 8 is in rotatable connection with the dose measuring ring 2. The end of the adjustment rod 8 is located inside the dose measuring ring 2, while the adjustment rod 8 can be rotated around its axis, so that, upon rotation of the adjustment rod 8, the fixed ring 1 moves relative to the dose measuring ring 2,
the invention relates to an in vitro measuring method of radioactive particle implantation dose, which comprises the following steps:
a. prepare the external measuring device of radioactive seed implantation dosage, including solid fixed ring 1, be provided with dose measuring ring 2 rather than coaxial in the one end of solid fixed ring 1, at solid fixed ring 1 and dose measuring ring 2 through apart from adjustment mechanism interconnect, solid fixed ring 1 and the interval of dose measuring ring 2 are adjusted by apart from adjustment mechanism, be provided with a plurality of dead levers 3 along the circumferencial direction on solid fixed ring 1, the length direction of dead lever 3 is the radius direction of solid fixed ring 1, be provided with a plurality of dosimeters 4 along the circumferencial direction on dose measuring ring 2, the length direction of dosimeter 4 is the radius direction of dose measuring ring 2, be provided with the flexible adjustment mechanism who is used for adjusting the flexible volume of dosimeter 4 on dose measuring ring 2.
b. The inner end of the fixing rod 3 is coincided with the inner wall of the fixing ring 1 by rotating the fixing rod 3, and the dosimeter 4 is adjusted by the telescopic adjusting mechanism to be coincided with the inner end of the dosimeter 2.
c. The fixed ring 1 and the dose measuring ring 2 are sleeved on the measured object, and the fixed rod 3 is rotated to enable the fixed rod 3 to fix the measured object at the center of the fixed ring 1.
d. The distance of the dose measuring ring 2 relative to the fixed ring 1 is adjusted by a distance adjusting mechanism, so that the plane of the dosimeter 4 on the dose measuring ring 2 coincides with the plane to be measured.
e. The telescopic adjustment mechanism is used for adjusting the telescopic amount of the dosimeters 4, so that the inner ends of all the dosimeters 4 reach the position to be measured, and the dosimeters 4 are used for measuring the dosage at the position.
f. And adjusting the distance adjusting mechanism and the telescopic adjusting mechanism for multiple times, measuring different planes and different distances of the measured object, and recording the measuring result and the measuring point position corresponding to the dosimeter 4.
g. After the measurement is finished, the inner end of the dosimeter 4 is returned to the inner wall of the dose measuring ring 2 through the telescopic adjusting mechanism, then the fixed rod 3 is rotated to return the inner end of the fixed rod to the inner part of the fixed ring 1, and the measured object is separated from the dose measuring ring 2 and the fixed ring 1.
The device for measuring the radioactive particle implantation dose in vitro further comprises a measured object fixing frame, wherein the object fixing frame comprises a cylindrical support main body 5, a measured object holder 6 is connected in the support main body 5 in a penetrating manner, the measured object holder 6 consists of a straight pipe 6-1 and a conical pipe 6-2 positioned at one end of the straight pipe, the conical pipe 6-2 consists of a plurality of petals, gaps are reserved between the adjacent petals, the straight pipe 6-1 is connected in the support main body 5 in an inserting manner, and the straight pipe 6-1 is connected with the support main body 5 in a threaded manner. When the volume of the measured object is small, the measured object is placed in the measured object holder 6, the support main body 5 is sleeved on the straight pipe 6-1 of the measured object holder 6, and the support main body 5 is slowly rotated to enable the conical pipe 6-2 to gradually clamp the measured object.
Fixed ring 1 and dose measuring ring 2 all are formed by two semicircle ring locks, and when the testee can't directly pass fixed ring 1 and dose measuring ring 2 (if there is the obstacle at the testee both ends to make it can't pass fixed ring 1 and dose measuring ring 2), cover fixed ring 1 and dose measuring ring 2 after opening on the testee, then buckle as an organic whole respectively with fixed ring 1 and dose measuring ring 2 again.
After the required point location dosage is completely measured, the equipment and the measured object can be scanned by CT, and the dosages of different positions in the measured object can be obtained through reasonable calculation. Thus, the measurement and calculation are combined, and objective and accurate dose distribution in and on the surface of the measured object can be obtained.
The invention uses the dosimeter 4 to directly measure the dosage of the measured object, changes the traditional dosage verification mode, and can be used for verifying whether the calculation result of the dosimeter 4 is accurate. By directly measuring the dosage, the artificial error is eliminated, and the result is more objective and accurate. Because the dose after the implantation of the particles is directly measured, the number and activity of the implanted particles are not required to be known in advance.
Compared with the existing dosimeters, the dosimeters 4 are distributed on a plane in 360 degrees, the dosage of each direction of the plane can be measured, no dead angle exists, and the positions of the dosimeters 4 can be adjusted, so that the dosage distribution of different radiuses on the plane can be measured. The whole device can keep consistent with the relative position of the measured object through the fixing column, and the relative position relation between any measuring point and the measured object can be well recorded. By adjusting the position of the dosimetry ring 2, different levels of dose can be measured, making three-dimensional dose measurement possible. Can be fixed on a human body or a particle implantation model, and the measurement time can be freely selected.
Claims (10)
1. The utility model provides an external measuring device of radioactive seeds implantation dosage, its characterized in that, includes solid fixed ring's one end is provided with the dose measuring ring rather than coaxial, gu fixed ring with the dose measuring ring passes through distance adjustment mechanism interconnect, gu fixed ring with the interval of dose measuring ring by distance adjustment mechanism adjusts gu fixed ring is last to be provided with a plurality of dead levers along the circumferencial direction, the length direction of dead lever does gu fixed ring's radial direction gu the last a plurality of dosimeters that are provided with along the circumferencial direction of dose measuring ring, the length direction of dosimeter does the radial direction of dose measuring ring be provided with the flexible adjustment mechanism who is used for adjusting all dosimeters flexible volume on the dose measuring ring.
2. The device for measuring the dose of the implanted radioactive seeds in vitro as claimed in claim 1, further comprising a holder for the object to be measured, wherein the holder for the object to be measured comprises a cylindrical support body, a holder for the object to be measured is penetrated in the support body, the holder for the object to be measured comprises a straight tube and a conical tube at one end of the straight tube, the conical tube part comprises a plurality of petals, a gap is reserved between adjacent petals, the straight tube is inserted in the support body, and the straight tube is in threaded connection with the support body.
3. The device for measuring the amount of a radioactive seeds implanted in a patient in vitro as set forth in claim 1, wherein the fixing ring and the dose measuring ring are formed by fastening two semicircular rings.
4. The device for measuring the external dose of a radioactive particle implant according to claim 1, wherein the telescopic adjustment mechanism comprises a position control ring coaxially arranged on the dose measuring ring, a thread is arranged on the cylindrical surface of the dosimeter, a helical tooth is arranged on the end surface of the position control ring, the helical tooth on the end surface of the position control ring and the thread on the dosimeter are mutually matched, and the dosimeter is driven to move along the length direction of the dosimeter by rotating the position control ring.
5. The radioactive seed implant dose in vitro measuring device according to claim 1, wherein the position control ring is composed of two semicircular rings.
6. The device for measuring the external dose of a radioactive seed implant according to claim 1, wherein the distance adjusting mechanism comprises an adjusting rod, the adjusting rod passes through the fixing ring, the adjusting rod is in threaded connection with the fixing rod, and the end of the adjusting rod is in rotatable connection with the dose measuring ring.
7. An in vitro measurement method of a radioactive particle implantation dose, comprising the steps of:
a. the device comprises a fixing ring, wherein a dose measuring ring coaxial with the fixing ring is arranged at one end of the fixing ring, the fixing ring and the dose measuring ring are connected with each other through a distance adjusting mechanism, the distance between the fixing ring and the dose measuring ring is adjusted through the distance adjusting mechanism, a plurality of fixing rods are arranged on the fixing ring along the circumferential direction, the length direction of each fixing rod is the radial direction of the fixing ring, a plurality of dosimeters are arranged on the dose measuring ring along the circumferential direction, the length direction of each dosimeter is the radial direction of the dose measuring ring, and a telescopic adjusting mechanism used for adjusting the telescopic amount of each dosimeter is arranged on the dose measuring ring;
b. the fixed rod is rotated to enable the inner end of the fixed rod to be superposed with the inner wall of the fixed ring, and the dosimeter is adjusted through the telescopic adjusting mechanism to enable the inner end of the dosimeter to be superposed with the inner wall of the dosimeter ring;
c. sleeving a fixing ring and a dose measuring ring on a measured object, and rotating a fixing rod to fix the measured object in the center of the fixing ring;
d. the distance between the dose measuring ring and the fixing ring is adjusted through the distance adjusting mechanism, so that the plane where the dosimeter on the dose measuring ring is located is overlapped with the plane to be measured;
e. the telescopic adjustment mechanism is used for adjusting the telescopic amount of the dosimeters, so that the inner ends of all the dosimeters reach positions to be measured, and the dosimeters are used for measuring doses at the positions;
f. adjusting the distance adjusting mechanism and the telescopic adjusting mechanism for multiple times, measuring different planes and different distances of the measured object, and recording a measuring result and a measuring point position corresponding to the dosimeter;
g. after the measurement is finished, the inner end of the dosimeter is returned to the inner wall of the dose measuring ring through the telescopic adjusting mechanism, then the fixed rod is rotated to return the inner end of the fixed rod to the inner part of the fixed ring, and the measured object is separated from the dose measuring ring and the fixed ring.
8. The method for measuring the radioactive particle implantation dose in vitro according to claim 7, wherein the device for measuring the radioactive particle implantation dose in vitro further comprises a measured object fixing frame, the object fixing frame comprises a cylindrical stent main body, a measured object holder penetrates through the stent main body, the measured object holder consists of a straight pipe and a conical pipe positioned at one end of the straight pipe, the conical pipe part consists of a plurality of petals, gaps are reserved between the adjacent petals, the straight pipe is inserted into the stent main body, and the straight pipe is in threaded connection with the stent main body; when the measured object volume is less, place the measured object in the measured object holder, cup joint the support main part on the straight tube of measured object holder, slowly rotate the support main part makes the toper pipe press from both sides the measured object tightly gradually.
9. The method of claim 7, wherein the fixing ring and the dose measuring ring are formed by two semicircular rings, and when the object cannot directly pass through the fixing ring and the dose measuring ring, the fixing ring and the dose measuring ring are opened and then sleeved on the object, and then the fixing ring and the dose measuring ring are fastened together again.
10. The method of claim 7, wherein the position control loop is comprised of two semicircular loops.
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| CN109946733A (en) * | 2019-02-25 | 2019-06-28 | 苏州笃瑞监测科技有限公司 | Personnel dosimeter front-end detector based on MPPC |
| CN111045074A (en) * | 2019-12-26 | 2020-04-21 | 上海金鹏源辐照技术有限公司 | Calibration method for response of irradiation dose with temperature |
| CN111538068A (en) * | 2020-05-07 | 2020-08-14 | 中国计量科学研究院 | Radioactive surface pollution measuring device and surface pollution measuring method |
| CN212515058U (en) * | 2020-08-28 | 2021-02-09 | 福建省肿瘤医院（福建省肿瘤研究所、福建省癌症防治中心） | Guide member for assisting radioactive particle activity measurement and automation device |
| CN215136107U (en) * | 2021-02-26 | 2021-12-14 | 张宏涛 | External measuring device for radioactive particle implantation dose |
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