A guided meditation can incorporate guided imagery, visualization, relaxation and positive suggestion.

Here are some definitions for visualization:

• visual image: a mental image that is similar to a visual perception
  
  
• visualization is any technique for creating images, diagrams, or animations to communicate a message. Visualization through visual imagery has been an effective way to communicate both abstract and concrete ideas since the dawn of man.
  
  
• The act of visualizing, or something visualized; The visual representation of data
  
  
• visualize - imagine; conceive of; see in one's mind; "I can see him on horseback!"

• visualize - form a mental picture of something that is invisible or abstract; "Mathematicians often visualize"

• visualized - envisioned: seen in the mind as a mental image; "the glory of his envisioned future"; "the snow-covered Alps pictured in her imagination".

• visualize - To form a mental image or vision; to imagine.
  
  

Here are some definitions of guided imagery:

• A technique that involves using the imagination and mental images to promote relaxation, changes in attitude or behavior, and encourages physical healing. Also known as visualization.
   
• Guided Relaxation combined with visualizing for health, success, learning, overcoming challenges.

• Guided imagery is a gentle but powerful technique that focuses and directs the imagination
  
  
• a relaxation technique in which a person visualizes or imagines things suggested to them by a recording or practitioner.
  
  
• This relaxation and stress-reduction technique uses positive thoughts and images to relieve pain, slow the heart rate, and stimulate the body's healing responses.

• it involves the whole body, the emotions and all the senses, and it is precisely this body-based focus that makes for its powerful impact.
   
• Harnessing the imagination to create a “construct of reality” can give us powerful yet gentle insight into our unconscious mind.
  
  
• Guided Imagery uses the power of the mind to enhance healing. It is in the body-mind where we hold perceptions of the past, in the form of emotions and images. Our beliefs are different because our perceptions of the past are unique.
  
  
• Guided Imagery is both a mental process (as in imagining) and a wide variety of procedures used in therapy to encourage changes in attitudes.
  
  
• Also known as guided meditation, the student or subject is asked to visualize scenes and imagine feelings.
  
  
• Using one's own conscious or preconscious, attention can be directed toward a specific goal such as pain of a behavioural problem, by means of imagery or an actual mechanism such as words, sounds, symbolics (the representation of things (diseases, feelings) by symbols or scents.

• Guided imagery is probably best known for its direct effects on physiology. Through imagery, an individual attempts to stimulate changes in body functions usually considered inaccessible to conscious influence.

For visualization programs see: http://www.yourholistichealthcare.com/visualization_health_success.html