How the X4 POSEIDON micro-CT sample carousel supports unattended, higher-throughput micro-CT imaging

In micro-CT, productivity is determined by more than the length of an individual scan. Time is lost when an instrument sits idle between samples, when an operator must return repeatedly to load the next specimen, or when several users are competing for access.

The optional X4 POSEIDON sample changer allows multiple samples to be prepared and queued in advance, allowing the X4 to continue scanning overnight or over the weekend without requiring someone to return and manually exchange each sample.

What is the X4 POSEIDON sample changer?

The sample changer is an optional 15-position automated carousel mounted at the front of the X4 POSEIDON. Once samples are loaded and scans are scheduled, the system can move from one sample to the next with less operator involvement.

This makes it possible to prepare a series of scans in advance and continue imaging during periods when an operator may not be available to change samples manually.

Figure 2: The X4 benchtop micro-CT system with front-mounted sample changer

Does the sample changer make an individual scan faster?

The sample changer does not directly shorten the acquisition time for a particular sample. Its primary benefit is reducing the idle time between scans.

Without automated sample changing, the system may finish a scan and remain unused until someone is available to remove the sample and load the next one. By keeping additional samples ready, the sample changer helps the X4 move more efficiently from one scan to another.

How many samples can it accommodate?

The sample changer provides 15 sample positions. Each position can accommodate a sample up to 50 mm in diameter and 80 mm in height.

Can samples be added while the X4 is operating?

Yes. An LED indicates the status of each position, and samples can be added or replaced while the system is operating without interrupting the scan currently in progress.

This can be especially helpful in a shared laboratory. Users do not necessarily have to wait for an entire sequence to finish before preparing another sample for the queue.

How does the system manage the scanning sequence?

The system provides automatic sample shuffling to improve efficiency.

Rather than treating the sample changer as a passive rack of samples, the X4 incorporates it into the imaging workflow so that instrument time can be used more effectively.

What types of laboratories benefit most?

The sample changer can be valuable wherever samples are scanned repeatedly or in batches, including:

• Shared micro-CT and imaging facilities serving multiple users
• Research laboratories conducting comparative sample studies
• Service laboratories processing samples for multiple projects
• Industrial and quality-control environments with routine scanning needs
• Studies involving multiple specimens, treatment groups, materials, or time points

The benefit becomes more significant as the number of samples or queued scans increases. Even when individual scans are relatively short, repeatedly stopping to exchange specimens can consume substantial staff time and leave gaps in instrument use.

Does automated loading eliminate the need for careful sample preparation?

No. Automation does not replace thoughtful experimental design or consistent sample preparation.

Samples must still be mounted securely, positioned appropriately, and associated with suitable acquisition settings. In comparative studies, consistency in mounting and scan parameters remains essential. The carousel automates movement between samples; it does not eliminate the need to establish a sound imaging method.

Preparing samples carefully before they enter the queue is therefore an important part of achieving both reliable results and efficient operation.

What happens when a larger sample or specialty stage is needed?

The sample changer can remain installed even when it is not being used. The operator retains full access to the X4 for loading larger samples or working with specialty stages.

This allows a laboratory to use automated batch scanning when appropriate without giving up the flexibility required for larger specimens or more specialized experiments.

Could Automated Sample Handling Improve Your Workflow?

Talk with a Micro Photonics specialist about your samples, scanning volume, and whether the X4 POSEIDON sample changer would be a practical fit for your laboratory.

Link to Ben’s email: Discuss Your Micro-CT Workflow