(312) 212-3470 info@goldanchormarker.com

Industry leading thin needles


  • Reduced risk of pneumothorax
  • Reduced patient discomfort – less need for anesthesia
  • Less risk of infection, edema, and bleeding
  • Less risk of seeding of cancer cells

comparison of needles 25g 22g 18g 17g

Fine needles for cytology have been used more than 50 years in all parts of the body with no to very little harm. Gold Anchor markers come preloaded in needles of the same size.

comparison 25G 22G 20G needles

Instant stability

Anchors immediately

Multiple cut-outs allow the fiducial marker to fold (Int. patents)

The fiducial marker is passive and will form different shapes depending on implantation technique.

  • Line shaped markers are useful for detecting plastic deformations and tilting.
  • Completely folded markers are suitable for systems with automatic marker detection.


  • Anchors directly
  • Trust each marker
  • Save lead time and travel



Anchors directly

Gold Anchor gets a great tissue attachment when the marker folds. The ball shaped marker becomes thicker than the needle tract and that prevents the marker from migrating in the needle tract when the needle is withdrawn.

Even as a line shaped marker the cut-outs in the Gold Anchor marker ensure a strong tissue attachment. The flexibility of the marker also allows it to absorb tissue deformation effectively.

Trust each marker

The stability of the marker in the tissue can also be verified by comparing the marker shape over time. One Gold Anchor marker can therefore be sufficient in selected cases where corrections for rotation and tilting are not performed. Preserved shape acts as a proof of no migration.

At planning

fiducial marker shaped at planning

At treatment


“Since incorporating The Gold Anchor into my practice, we have been able to treat patients with an increased level of efficiency, safety, and accuracy. Its thin needles allow for a more tolerable fiducial marker, which has led to significantly lower infection rates post placement.

The unique design minimizes migration after placement, which leads to consistent CT imaging as treatment continues. All of this allows for quick and accurate care.”

Scot Ackerman, M.D.

Radiation Oncologist, Medical Director, Ackerman Cancer Center

Use fewer fiducial markers

1 Gold Anchor


Enables adjustment of translational setup errors (X-Y-Z).

2 Gold Anchors


Enables adjustment of translation and rotation provided that at least one of the markers is implanted with a line shape, which also makes it easier to distinguish the two markers from each other in the lateral view.

3 Gold Anchors


Enables adjustment of translation and rotation. Ideal for registration of CT and MR images.

Note: Traditional fiducial markers are more likely to migrate and many centers therefore implant at least three traditional fiducial markers to be able to detect if any of those markers have moved (by looking for a potential change in the distance between the markers).

Save lead time and travel

With Gold Anchor there is no need wait the usual 7-21 day before dose planning. The thin Gold Anchor needle, that causes minimal bleeding and swelling, in combination with the strong tissue attachment of the marker, makes it possible to proceed with CT and/or MR for dose plan on the same day as implantation.

Note: Most centers that use traditional markers send their patient home for 7-21 days after implantation to allow the traditional markers to “settle in”, i.e. to allow the potential bleeding and swelling subside to reduce the risk that the traditional markers migrate in the tissue.

lead time gold anchor compared to traditional fiducial

Great visibility

Also on MRI, thanks to unique material

Thin marker in unique material

The marker is only 0.28 or 0.4 mm thick, which improves the surface-to-volume ratio.

The marker is made of an alloy of gold and 0.5% iron for improved MR visibility (pat. pend.).


  • Reduce CT-artifacts
  • Easily register CT and MR images
  • Clearly visible on kV and ultrasound
  • Ideal for proton therapy

Reduce CT artifacts

The small Gold Anchor markers cause limited CT-artifacts.

 fiducial marker and prostate on CT image

Easily register CT and MR images

T1-weighted MR sequence

Ball shaped Gold Anchors are clearly visible on ordinary T1-weighted MR sequences.

T2-weighted MR sequence

Ball shaped Gold Anchors can also typically be identified on T2-weighted MR sequences. You can thereby detect and adjust for any potential organ movement between MR sequences.

Minimize artifacts and dose pertubation

T2-weighted MR sequence

To further minimize CT artifacts the Gold Anchor markers can be implanted with a line shape. This is also ideal for proton therapy since it minimizes dose perturbation.

Image courtesy of the Department of Oncology and Radiotherapy, Turku University Hospital.

T2-weighted MR sequence

Line shaped 0.4 mm diameter markers can be visualized with Balanced Fast Field Echo (bFFE) MR sequences.

Image courtesy of the Department of Oncology and Radiotherapy, Turku University Hospital.

Clearly visible on kV

Gold Anchor has been designed for use with kV imaging. The kV x-ray is heavily attenuated whenever it passes through a material of high density, such as gold. A high kV, approximately 130 kV, should be used to fade away the skeleton structures.

kV image

Visible on MVCT

The 0.4×20 mm Gold Anchor markers are visible on MVCT if they have been implanted with a ball shape.

MVCT image

MVCT registered to CT images to determine need for repositioning. The MVCT images have been captured with a Siemens ARTISTE system at the Nu-Med Radiotherapy Clinic in Elblag, Poland.

MVCT registered to CT

Gold Anchor enables easy fusion of CT and MR images

Two Gold Anchors implanted in prostate. In the images below, the CT and MR images are matched on two markers, one in each lobe.

Liver CT

patient 1

Images courtesy of Dr. Hiroshi Doi, Mr. Shogo Harui and Dr. Yoshio Hishikawa at the Meiwa Cancer Clinic, Japan

Liver MRI

patient 2

Images courtesy of Dr. Hiroshi Doi, Mr. Shogo Harui and Dr. Yoshio Hishikawa at the Meiwa Cancer Clinic, Japan