The ISIS QA-1 phantom provides “Machine to Machine” Geometric QA for the PET, PET/CT, MRI, CT Scanner, CT Simulator, Simulator, Virtual Simulator, Treatment Planning System, Treatment Machine and Lasers.

The ISIS QA-1 Phantom was designed to provide an easy approach to the daily, monthly, and annual QA Tasks. This phantom will aid in verifying the geometric laser position accuracies with multiple laser systems within your department. It also provides the ability to verify electron beam density values produced by your CT/CT Simulator. To do this, scan the four unique density value inserts then transfer this image to the RTP system for verification of the electron density values of the Bone, Water, Inhale and Exhale Lung density inserts. Comparing the individual value for each known density value the user can quickly verify CT image electron density values for treatment planning image QA.

Additionally, the ISIS QA-1 includes a known object insert that is to be scanned with the CT/CT Simulator. With this multiple image slice set you can create a Treatment Plan/Virtual Simulation plan of the known object for size and location verification through your RTP and Virtual Simulation system. The ISIS QA-1 goes one step further to use these known geometric phantom positions for verification of the laser positions as verified with the scanned ISIS QA-1 phantom. This QA process provides a geometric QA of the processed RT Plan for use with IMRT treatment machine lasers and mechanical treatment field setup verifications.

The included dose chamber insert allows the physicist the ability to quickly measure single point dose values without using additional phantom devices.

CT Simulation RT Field Marking Verification QA:
The ISIS QA-1 provides the user the ability to scan, plan and verify the exported RTP beam designs of the intended treatment field to the laser marking system for laser point position verification. Additionally this process can be accomplished on the intended treatment machine.

A sample generic QA process is described as follows:
Scan the phantom after you have verified that the position of the ISIS QA-1 phantom is centered in the X and Y position of the scan plane. This is accomplished by physically moving the ISIS QA-1 phantom and verifying the placement position with the tool set supplied with the scanner. Additionally, verify that the tilt of gantry is at a “0” degree tilt in respect to center of the ISIS QA-1 phantom. Once alignment is verified correctly you scan the ISIS QA-1 phantom at 1 mm increments throughout the entire phantom body. Then create three 10 cm x 10 cm RTP / Virtual Simulation plans for export to the laser marking system for laser position verification. Then compare the expected field positions with the actual laser field illuminated positions. These positions are viewed on three of the external sides of the ISIS QA-1 phantom.

With the object insert positioned in the exact center of the ISIS QA-1 phantom it provides laser position RTP field verification. When the ISIS QA-1 is setup on the treatment couch you can verify lasers / field lights and the expected treatment dose by using an ionization chamber with the dose chamber insert.

General Benefits of the ISIS QA-1
Two mm wide alignment verification grooves on the surfaces of the ISIS QA-1 provide for easy viewing and quick alignment checks of laser beam positions.

Multiuse QA machine programs within the therapy department can use the ISIS QA-1 phantom.

Provides the ability to verify scanned image set position alignment from the radiology department to the radiation therapy department for geometric verifications prior to the laser marking process.

Precision 10 cm x 10 cm and 5 cm x 5 cm fixed fields on three surfaces of the ISIS QA-1 phantom provide for exact image and beam geometric design QA verification.

Easy leveling base for setting up an exact level plane for the QA process from machine to machine.

Single slice check for laser-offset verification with standard CT Scanner and / or CT Simulator. Treatment machine QA for lasers, mechanicals, and beam geometry.

Electron Density Verification Plugs
The four ISIS QA-1 electron density plugs provide the user with the ability to easily verify the electron density values produced on the CT/CT Simulator. This is of particular benefit when determining the consistency of electron density values from week to week. The plugs are Bone (+800), H20 (0.0), Inhale Lung (-800) and Exhale Lung (-500). This verification is useful in providing a repeatable and dependable QA program for in-house machine to machine transfer of images. This QA task can be accomplished on a daily, weekly, monthly and annual basis.

The ISIS QA-1 package includes the following items:
• Phantom Cube (Item 681-100)
with Bone, Water, Lung Inhale and Lung Exhale density plugs
• Leveling Platform with 20 cm Field (Item 681-159)
• Alignment Bar (Item 681-150)
• Insert for Farmer Style Chamber (Item 681-104) - Customer needs to specify manufacturer, model number and description of ion chamber.
• 2.54 cm Object Insert (Item 681-101)
• (20) Tungsten Pins (Item 681-112)
• 50 cm Ruler (Item 681-120)
• Magnetic Gantry Level with Light - batteries not included (Item 352-234)
• Round Bubble Level (Item 681-121)
• Protective Rolling Case (Item 681-193)

ISIS QA-1 General Specifications:

Phantom Dimensions: 14 cm W x 14 cm L x 14 cm H
Electron Density of Acrylic: 3.847 x 1023
Weight: 8 lbs
Carrying Case Dimensions: 32 1/2” L x 21 1/2” W x 11 1/2” D
Total Shipping Weight: 45 lbs

Items included with the ISIS QA-1 Package

This black case has rigid wall construction and reinforced rounded bumper corners. For ease in transport there are two heavy duty urethane wheels and a 7” extension handle. The case has seven latches, an o-ring seal and an atmospheric purge valve. The case is airtight, watertight and corrosion proof. The inside has foam padding with cutouts for the components. The outside dimensions are 20 1/2” W x 32 1/2” L x 11 1/4” D  Weight: 30 lbs.

This insert holds a farmer style chamber (without build-up cap) with the center of the collection volume at the center of the phantom cube.
The Farmer Chamber Insert accommodates the following chambers:

PTW: 23333, 30001, 30002, 30004, 30006, 30010, 30011, 30012, 30013
Bicron/NE 2571, 2581, 2505/3 (A or B), Nuclear Associates 30-351, Capintec PR-06G, PR-06C, Victoreen 580-006, Exradin A19, RMI 448

This insert has a 2.54 cm Teflon ball centered in the insert. The teflon ball is used as tumor value to verify measurement accuracy on the CT/CT Simulator and treatment planning system.
Density: 2.13 - 2.2 g/cm³

Torpedo level with three lighted vials and a magnetic strip.  Batteries are not included.