Is there a way to open DICOM files?

All available from Ubuntu software center:

• dicomscope. manual page.

  sudo apt install dicomscope
  

  DICOMscope is a free DICOM viewer which can display uncompressed, monochrome DICOM images from all modalities and which supports monitor calibration according to DICOM part 14 as well as presentation states. DICOMscope offers a print client (DICOM Basic Grayscale Print Management) which also implements the optional Presentation LUT SOP Class. The development of this prototype was commissioned by the "Committee for the Advancement of DICOM" and demonstrated at the European Congress of Radiology ECR 1999. An enhanced version was developed for the "DICOM Display Consistency Demonstration" at RSNA InfoRAD 1999. The current release 3.5.1 has been demonstrated at ECR 2001 and contains numerous extensions, including a print server, support for encrypted DICOM communication, digital signatures and structured reporting.

• ginkgo-cadx.

  sudo apt install ginkgocadx
  

  Ginkgo CADx is an advanced DICOM viewer and dicomizer (converts png, jpeg, bmp, pdf, tiff to DICOM).

• aeskulap

  sudo apt install aeskulap
  

  Aeskulap is a medical image viewer. It is able to load a series of special images stored in the DICOM format for review. Additionally Aeskulap is able to query and fetch DICOM images from archive nodes (also called PACS) over the network. The goal of this project is to create a full open source replacement for commercially available DICOM viewers. Aeskulap is based on gtkmm, glademm and gconfmm and designed to run under Linux. Ports of these packages are available for different platforms. It should be quite easy to port Aeskulap to any platform were these packages are available.

You can also just use GIMP (GNU Image Manipulation Program) to open DICOM images.

From all viewers I tested I liked Weasis the most.

It is cross-platform, has lots of features (measurement, 2D/3D view, ...) and works just fine.

Viewer Features

• Display all kinds of DICOM files (including multi-frame, enhanced, MPEG-2, MPEG-4, MIME Encapsulation, SR, PR, KOS, AU, RT and ECG)
• Viewer for common image formats (TIFF, BMP, GIF, JPEG, PNG, RAS, HDR, and PNM)
• Image manipulation (pan, zoom, windowing, presets, rotation, flip, scroll, crosshair, filtering...)
• Layouts for comparing series or studies
• Advanced series synchronization options
• Display Presentation States (GSPS) and Key Object Selection
• Create key images (Key Object Selection object) by selection
• Support of Modality LUTs, VOI LUTs, and Presentation LUTs (even non-linear)
• Support of several screens with different calibration, support of HiDPI (High Dots Per Inch) monitors, full-screen mode
• Multiplanar reconstructions and Maximum Intensity Projection
• Display Structured Reports
• Display and search into all DICOM attributes
• Display cross-lines
• Measurement and annotation tools
• Region statistics of pixels (Min, Max, Mean, StDev, Skewness, Kurtosis, Entropy)
• Histogram of modality values
• SUV measurement
• Save measurements and annotations in DICOM PR or XML file
• Import CD/DVD and local DICOM files
• Export DICOM with several options (DICOMDIR, ZIP, ISO image file with Weasis, TIFF, JPEG, PNG...)
• Magnifier glass
• Native and DICOM printing
• Read DICOM image containing float or double data (Parametric Map)
• DICOM ECG Viewer