Marker, Rod, Ruler, & Pen Point Sources
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ALARA provides Eckert & Ziegler Isotope Products (EZIP) sources for reference, instrument calibration, patient orientation, identifying regions of interest, anatomical locations, organ sizes, etc.
- Spot Markers
- Rod Sources
- Rigid & Flexible Rulers
- Pen-Point Markers
A variety of radionuclides & activities available!
Spot Markers
EZIP Spot Markers are used for patient orientation during SPECT studies. A 0.136” (3.45 mm) diameter active area is marked with purple epoxy and centered in a 1” x 0.250” (25.4 mm x 6.35 mm) clear acrylic disk.
| Model # | Radionuclide | Activity (MBq) | Activity (μCi) |
| SM-057-25U | Co-57 | 0.925 | 25 |
| SM-057-50U | Co-57 | 1.85 | 50 |
| SM-057-100U | Co-57 | 3.7 | 100 |
| SM-057-200U | Co-57 | 7.4 | 200 |
Contained activity is supplied as a nominal value ± 15%
Rod Sources
EZIP Rod Sources are used as reference sources for instrumentation and NIST traceable or nominal calibration. Each source consists of a lucite rod measuring either 5” x 0.5” (127 mm x 12.7 mm) or 2.95” x 0.5” (74.9 mm x 12.7 mm).
5″ (127 mm) Rods
| Model # | Radionuclide | Activity (kBq) | Activity (nCi) |
| GF-0008 | Cs-137 | 18.5 | 10 |
| GF-0009 | Eu-152 | 18.5 | 500 |
| GF-0206 | Cs-137 | 3.7 | 100 |
| GF-0207 | Co-57 | 3.7 | 100 |
| GF-0210 | Co-57 | 37 | 1000 |
| GF-0211 | Cs-137 | 37 | 1000 |
| GF-0239 | Ba-133 | 3.7 | 100 |
| GF-0298 | Ge-68 | 18.5 | 500 |
3″ (74.9 mm) Rods
| Model # | Radionuclide | Activity (kBq) | Activity (nCi) |
| GF-0012 | Co-57 | 3.7 | 500 |
| GF-0014 | Cs-137 | 3.7 | 100 |
| GF-0208 | Co-57 | 37 | 1000 |
| GF-0235 | Ba-133 | 3.7 | 100 |
| GF-0266 | Ba-133 | 185 | 5000 |
| GF-0322 | Co-57 | 370 | 10000 |
Ruler Markers
Radioactive ruler markers are used to define anatomical locations and/or organ size during a SPECT study.
Flexible Ruler
The Flexible Ruler is a plastic tube 0.19” (4.8 mm) in diameter containing 45 alternating 0.394” (10 mm) sections of Co-57 and inactive lead. The overall length of the ruler is 19” (48 cm) with an active length of 17.7” (45 cm).
| Model # | Description | Activity (MBq) | Activity (μCi) |
| FM-057-150U | Co-57 Flexible Marker | 5.5 | 150 |
| FR-057-230U | Co-57 Flexible Ruler | 8.5 | 230 |
| FR-057-460U | Co-57 Flexible Ruler | 17 | 460 |
Contained activity is supplied as a nominal value ±15%.
Rigid Ruler
The Rigid Ruler is a plastic tube 0.197″ (5 mm) in diameter containing 15 alternating 0.394″ (10mm) sections of Co-57 and inactive lead. The overall length of the ruler is 6.7″ (17 cm) with an active length of 5.91″ (15 cm).
| Model # | Description | Activity (MBq) | Activity (μCi) |
| RR-057-80U | Co-57 Rigid Ruler | 2.96 | 80 |
| RR-057-160U | Co-57 Rigid Ruler | 5.92 | 160 |
Contained activity is supplied as a nominal value ± 15%
Pen Point Markers
The EZIP Pen Point Marker is used to mark a point or region of interest during SPECT studies. The Pen Point Marker contains Co-57 in a resin matrix at the end of a 5.4” (13.7 cm) anodized aluminum rod. The pen-shaped rod screws into a brass cap which shields the active point. The Pen Point Marker is used in tracing the outlines of anatomical features on a patient. The trace appears almost instantly on the image display.
| Model # | Radionuclide | Activity (MBq) | Activity (μCi) |
| PP-057-100U | Co-57 | 3.7 | 100 |
| PP-057-200U | Co-57 | 7.4 | 200 |
| PP-057-250U | Co-57 | 9.25 | 250 |
Contained activity is supplied as a nominal value ± 15%
