380931_Integrity Veterinary Center_XPR_MH_20240322_ToshibaCT_MA
LANDAUER Medical Physics 2 Science Road, Glenwood, IL 60425 Office: 1.888.831.4880 Option 3 Fax: (800) 691-6159 landauermp.com
March 22, 2024
Lauren Payne, Practice Manager
Integrity Veterinary Center
518 Pleasant Street
Northampton, MA 01060
Telephone: (413) 614-0039
Email: lauren@integrityvetcenter.com
RE: DIAGNOSTIC X-RAY ROOM SHIELDING DESIGN REPORT - CT
Dear Ms. Payne,
Enclosed please find the shielding design report for the Toshiba Aquilion ONE CT installation.
• Please review the report carefully to ensure all submitted information was correctly
interpreted and to notify us of any revisions that need to be addressed.
• Please file a copy of this report with the Massachusetts Division of Radiation Protection. You
should receive correspondence from that agency shortly regarding receipt of the plan review.
• Landauer’s recommendations are based upon the state regulations:
Code of Massachusetts Regulations, Title 105, Chapter 120
• The state regulations are available for review on the following website address:
http://www.mass.gov\dph\rcp
• Retain a copy of the report to document the calculated shielding required to meet dose limits
prescribed in 105 CMR 120.211 and 105 CMR 120.221.
• 105 CMR 120.210(A) and 105 CMR 120.404(A)(1)(d) requires facilities to develop,
document, and implement a Radiation Protection Program.
If you would like assistance with post-installation radiation survey requirements and/or with
developing a site-specific Radiation Protection Program, please request a quote by contacting our
team of Shield Design Coordinators at 1.888.831.4880 Option 3 or by emailing them at
shieldingdesign@landauermp.com. They are also available to answer any other questions you may have
with this Shield Design Report.
Thank you for choosing Landauer Medical Physics as your radiation protection service provider.
Sincerely,
Michelle Hernandez, M.S.
Medical Physicist
LANDAUER Medical Physics
“LANDAUER is here to help you as your resource for radiation safety services!!”
LANDAUER Medical Physics 2 Science Road, Glenwood, IL 60425 Office: 1.888.831.4880 Option 3 Fax: (800) 691-6159 landauermp.com
March 22, 2024
Massachusetts Radiation Control Program
Schrafft Center, Suite 1M2A 529 Main Street Charlestown, MA 02129 T: (617) 242-3035 F: (617) 242-3457
Dear Program Manager,
Enclosed please find a copy of the Diagnostic X-ray Room Shielding Design Report for:
Facility Name: Integrity Veterinary Center
Facility Address: 518 Pleasant Street, Northampton, MA 01060
Contact: Lauren Payne, Practice Manager
Mailing Address: 518 Pleasant Street, Northampton, MA 01060
Contact Telephone: (413) 614-0039
Contact Email: lauren@integrityvetcenter.com
Facility Type: Veterinary
Machine Type: CT
Facility Workload: 100 mA-min/week (4 patients/week)
Should you have any questions regarding this shielding plan, please contact our team of Shield Design
Coordinators at 1.888.831.4880 Option 3 or e-mail them at shieldingdesign@landauermp.com.
Thank you for your attention to this matter.
Sincerely,
Michelle Hernandez, M.S.
Medical Physicist
LANDAUER Medical Physics
Integrity Veterinary Center March 22, 2024
Page 3 of 7
PLAN REVIEW SHIELDING REPORT
Shielding Recommendations: Toshiba Aquilion ONE
Wall
Section
Protected
Area Type
LMP Recommended Shielding
(See Note 1)
A-B Control SU 1/32” Lead Wall and 1/32” Lead Equivalent Glass
B-C Kennels SU 2 Layers 5/8" (1.25") Gypsum is Adequate.
C-D Electrical SU 2 Layers 5/8" (1.25") Gypsum is Adequate.
D-E Exterior SU None; Existing Construction is Adequate
E-F Exterior SU None; Existing Construction is Adequate
F-A Control Area SU
20 Gauge Steel Door Closed During Exposures
OR 1/32" Lead Door Closed During Exposures
Ceiling Roof SU None; Existing Construction is Adequate
Floor Slab on Grade N/A None; Nothing Below.
P = primary barrier; S = secondary barrier; C = controlled area; U = uncontrolled area; OF = occupancy factor
Toshiba Aquilion 64-128 Calculation Parameters
Imaging Type N weekly Workload
(mA-min/week) kVp
CT 4 100 120
Additional Variables & Calculated Transmission
Wall Section Distance
(m)
P Design Goal
(mR/wk)
Occupancy
Factor
T
K sec (0)
(mR/wk)
* Transmission
Factor B(x)barrier
A-B 4.21 2 1 17.04 0.117
B-C 3.55 2 0.125 2.99 0.668
C-D 2.86 2 0.05 0.57 3.480
D-E 2.74 2 0.025 0.09 23.356
E-F 2.50 2 0.025 0.40 4.969
F-A 4.30 2 1 16.32 0.123
Ceiling N/A N/A N/A N/A N/A
Floor N/A N/A N/A N/A N/A
---------------------------------------------------------------------------------------------------------------------------------------------------
Design dose limits: Uncontrolled - 2 mrem/week (100 mrem/year); Controlled - 10 mrem/week (500 mrem/year)
* NCRP 147 Transmission Factor, B(x):
Integrity Veterinary Center March 22, 2024
Page 4 of 7
Definition of Terms
N weekly – number of patients per week
K sec(0) – total weekly unattenuated air kerma at point of interest from source for all patient exposures
Distance – total distance from scatter object to the area of concern (distance to wall plus 1 foot) for secondary
scatter; primary beam distance is the distance from the tube to the area of concern (distance to wall plus 1 foot)
T – Occupancy factor (hours per week a person spends in the protected area)
P week – Design Goal or exposure limit per week
B(x) – radiation transmission through a given barrier material (x)
Table Notes and Additional Information
• IMPORTANT - This plan review is specific for the information provided by the requestor. Any changes
in equipment, room layout, occupancy of adjacent areas, changes in x-ray workload, upgrades to
additional imaging modalities, changes in field size of imaging receptors, or any other condition that
may contribute to an increased risk of radiation exposure will require re-evaluation of the shielding by a
qualified physicist. If there are any doubts about what may constitute a change, please contact
LANDAUER Medical Physics
• Note 1 - Areas beyond the immediate adjacent space to the barrier of interest have been considered
when determining shielding recommendation.
• The recommended shielding is the total thickness of specified material needed to reduce the radiation
dose below regulatory limitations.
• Prior to construction of all new installations, or modifications of existing installations, or installation of
equipment into existing facilities utilizing X-rays for diagnostic or therapeutic purposes, the floor plans
and equipment arrangements shall be submitted to the agency for review and verification that national
standards have been met.
• Regulatory Note: A dead-man type of exposure switch shall be provided, together with an exposure
cord of sufficient length, so that the operator can stand out of the useful beam and at least six feet from
the animal during all x-ray exposures. {Massachusetts Code of Regulations, Title 105 Section
120.408(A)(7)}
• Door to room closed during x-ray production.
• Wall shielding should extend up from the finished floor to a height of at least 84”. The vendor-
stocked wall materials are commonly available for this height of shielding.
• All shielded barriers, including view windows and frames, doors and door frames, should be of the
specified shielding equivalencies or greater and should have no voids.
• Any penetrations in the shielding should be designed to afford the same shielding equivalency as
specified for that barrier.
Integrity Veterinary Center March 22, 2024
Page 5 of 7
• Penetrations in the shielding (electrical boxes, cables, fasteners, etc.) should be secured in place with
mechanical fasteners or by welding. Metal screws do not require lead caps and the use of tapes,
adhesives or plastic materials as a fastener is not recommended.
• Landauer Medical Physics performs transmission calculations based on the information provided by the
requestor’s Shield Design application and cannot be held responsible for errors in shielding
requirements due to inaccurate information.
• These shielding specifications have been prepared in accordance with guidelines set forth in National
Council on Radiation Protection and Measurements Report 147, and Massachusetts Code of
Regulations.
• The state agency reserves the right to impose additional requirements, as it deems appropriate or
necessary to minimize danger to public health, safety or property.
Shielding Calculations Submitted by:
Michelle Hernandez, M.S.
Medical Physicist
LANDAUER Medical Physics
Integrity Veterinary Center March 22, 2024
Page 6 of 7
Shielding Recommendations: Toshiba Aquilion ONE
Wall Section Barrier Type LMP Recommended Shielding
A-B (Control) Wall/Window 1/32” Lead Wall and 1/32” Lead Equivalent Glass
B-C (Kennels) Wall 2 Layers 5/8" (1.25") Gypsum is Adequate.
C-D (Electrical) Door/Wall 2 Layers 5/8" (1.25") Gypsum is Adequate.
D-E (Exterior) Wall None; Existing Construction is Adequate
E-F (Exterior) Wall None; Existing Construction is Adequate
F-A (Control Area) Door 20 Gauge Steel Door Closed During Exposures
OR 1/32" Lead Door Closed During Exposures
Ceiling (Roof) Ceiling None; Existing Construction is Adequate
Floor (Slab on Grade) Floor None; Nothing Below.
Integrity Veterinary Center March 22, 2024
Page 7 of 7
Client Submitted Drawing